Chapter Summaries

Key Plot Points and Events

• Shuya and Yukino discover that they've forgotten someone important while going through magazines.
• They realize that the key to their memory loss lies in the magazines' high-selling issues.
• They remember Sakurajima Mai and go to her apartment in Fujisawa, but she's not there.
• They search for her at Fujisawa Station, finding it crowded due to Sunday tourism.

Character Developments

• Shuya and Yukino work together to solve the mystery of their forgotten friend.
• Shuya remains calm under pressure, while Yukino shows anxiety.
• Neither character has a significant personal development in this chapter.

Significant Themes

• Memory and forgetfulness.
• The power of celebrity and influence (as seen in the magazines' high sales).
• The search for a missing person.

Character Interactions

• Shuya and Yukino work as a team, discussing their findings and sharing their thoughts.
• They show concern for their forgotten friend, Mai.
• There's no significant conflict or resolution in their relationship in this chapter.

Key Plot Points and Events

• Sakurajima Mai appears in a revealing bunny-girl outfit at the station, causing Shuya and Yukino to hide and suspect foul play.
• They follow Mai, thinking she might be in danger, but she reveals she's fine and was testing their reaction.
• Mai invites them to her house and explains that she's been invisible to people since early April, except when she's with Shuya or Yukino.

Character Developments

• Shuya: Shows concern for Mai's safety but also takes advantage of the situation to get closer to her and Yukino. He's initially dismissive of Mai's problem but later feels guilty for not helping her earlier.
• Yukino: Shows more concern and understanding towards Mai's situation. She's protective of Mai and disapproves of Shuya's perverted behavior.
• Mai: Initially embarrassed about her invisibility problem, Mai decides to confide in Shuya and Yukino. She's also upset with Shuya for not taking her problem seriously earlier.

Significant Themes

• Friendship and Trust: Mai's invisibility problem tests the bonds between her, Shuya, and Yukino. They ultimately decide to support her.
• Communication: Mai's reluctance to share her problem initially leads to misunderstandings and hurt feelings.

Character Interactions

• Shuya and Yukino: They argue over who cares more about Mai, leading to a playful competition.
• Mai and Yukino: They bond over their shared experience of being invisible, with Yukino showing more understanding and support.
• Mai and Shuya: Their relationship is strained due to Shuya's initial dismissal of Mai's problem, but they make up by the end of the chapter.

Key Plot Points and Events

• Mai's classmates and teachers start forgetting her, while those closer to her, like Shuya and Yukino, remember her longer.
• Shuya and Yukino investigate and find that people within a certain radius of Mai's school remember her, while those farther away don't.
• Shuya decides to take a few days off from his school to investigate Mai's school and help her.

Character Developments

• Mai: Starts to understand the severity of her situation and relies more on Shuya and Yukino for support.
• Shuya: Shows concern and protectiveness towards Mai, revealing his serious side despite his usual laid-back demeanor.
• Yukino: Demonstrates her intelligence and analytical skills by proposing a hypothesis about the factors affecting people's memories of Mai.

Significant Themes

• Closeness and strength as factors affecting memory and perception of Mai's situation.
• The struggle against helplessness and the desire to protect others, as seen in Shuya's determination to help Mai.

Character Interactions

• Shuya and Mai: Their bond deepens as Shuya becomes more protective of Mai, and Mai relies on Shuya for support.
• Shuya and Yukino: They work together to investigate Mai's situation and support her, showing their teamwork and mutual understanding.
• Mai and Yukino: They continue to get along well, with Mai feeling comfortable enough to use similar phrasing as Yukino.

Key Plot Points and Events

• Shuya, Mai, and Yukino go out together to buy daily necessities.
• They decide to explore Fujisawa and Enoshima together to help Mai take her mind off things.
• While on the train, they are pressed together due to the crowd, causing some discomfort and tension.
• They visit the aquarium but decide to leave due to the crowded conditions and people bumping into Mai.

Character Developments

• Mai struggles with accepting Shuya's presence in her home but eventually agrees due to his useful ability.
• Yukino acts as a mediator between Mai and Shuya, showing a more caring and considerate side.
• Shuya remains calm and collected despite the uncomfortable situation on the train, showing self-control.

Significant Themes

• The challenges of maintaining a peaceful coexistence among different personalities and backgrounds (Shuya, Mai, and Yukino).
• The struggle to adapt to new circumstances and accept change (Mai's initial reluctance to let Shuya stay).
• The difficulties of navigating crowded public spaces for those with unique abilities or appearances (Mai's issue with people bumping into her).

Character Interactions

• Mai and Yukino bond over their shared disdain for Shuya's behavior, creating a sense of camaraderie between them.
• Shuya's calm demeanor contrasts with Mai and Yukino's sharp tongues, leading to humorous banter between them.
• The three characters struggle to maintain their composure and patience in crowded situations, leading to tension and discomfort.

Key Plot Points and Events

• The group travels to Kamakura, where they see the sea for the first time.
• They visit Shichirigahama, where Shuya had met Shoko Makinohara, his self-proclaimed future wife.
• Shuya shares his thoughts on fate, life, and death, influenced by his encounter with Shoko.

Character Developments

• Shuya: Reflects on his past behavior and apologizes to Mai. He also expresses his changed perspective on fate and life, influenced by Shoko.
• Mai: Shows concern for Shuya's well-being and tries to understand his perspective, despite not fully grasping it.
• Yukino: Remains pragmatic and analytical, questioning Shuya's idealistic views on fate and life.

Significant Themes

• Fate vs. Free Will: Shuya's belief in changing fate through supernatural powers contrasts with Yukino's pragmatic view.
• Reflection and Growth: Shuya reflects on his past behavior and apologizes to Mai, showing personal growth.
• The Influence of the Past: Shuya's encounter with Shoko Makinohara influences his perspective on life and death.

Character Interactions

• Shuya and Mai: Their relationship improves as Shuya apologizes for his past behavior, and Mai accepts his apology.
• Shuya and Yukino: They have a philosophical disagreement about the nature of fate and life, with Shuya being more idealistic and Yukino more pragmatic.
• Mai and Yukino: They work together to cook dinner, showing a friendly dynamic despite their differences.

Key Plot Points and Events

• Shuya eavesdrops on Mai and Yukino discussing how they remembered Mai.
• Mai decides to take a bath, and Shuya insists on accompanying her, fearing she might disappear again. Mai and Yukino bathe together, leaving Shuya disappointed.
• Shuya explores Mai's house, finding letters from her younger half-sister. He reads them while Mai and Yukino are bathing.
• Mai and Yukino find Shuya reading the letters and join him. They notice changes in Shuya's attitude.
• Shuya looks through an old photo album of Mai with her family. They spend the evening together before going to sleep. Mai and Yukino sleep on the bed, while Shuya sleeps on a pallet beside them.

Character Developments

• Shuya shows genuine concern for Mai's safety, indicating his growing feelings for her.
• Mai and Yukino notice changes in Shuya's behavior, suggesting he's starting to take his feelings seriously.
• Mai remains cautious about Shuya's intentions, while Yukino supports him.

Significant Themes

• Fate and Destiny: Shuya's experience with Mai's memory loss has made him more aware of the fragility of their relationship.
• Trust and Caution: Mai is cautious about Shuya's intentions, while Shuya tries to gain her trust.
• Change and Growth: Both Shuya and Mai are changing and growing, affecting their dynamic.

Character Interactions

• Shuya and Mai: Shuya shows concern for Mai's safety, while Mai remains cautious but playful with him.
• Shuya and Yukino: Shuya involves Yukino in his plans, and they have a friendly, teasing dynamic.
• Mai and Yukino: Mai and Yukino share a close, supportive friendship, often reading and bathing together.

Key Plot Points and Events

• Mai, Shuya, and Yukino spend a night together at Mai's house.
• Shuya takes a photo of Mai and Yukino sleeping together.
• They go to Mai's school in disguise to investigate her social isolation.
• Shuya notices a boy who can see through his Strange Arts.
• They explore the school, finding nothing unusual.

Character Developments

• Mai: Her isolation at school is emphasized, showing her loneliness and lack of social interaction.
• Shuya: He feels uncomfortable with the stifling atmosphere at Mai's school and starts to understand her difficulties better.
• Yukino: She shows concern for Mai's situation and works alongside Shuya to investigate the cause.

Significant Themes

• Isolation and loneliness: Mai's social isolation is a central theme, highlighting the emotional toll it takes on her.
• Power dynamics: The dynamics between Shuya, Yukino, and Mai are explored, with Shuya and Yukino trying to understand and help Mai.
• Investigation and discovery: The chapter focuses on Shuya and Yukino's investigation of Mai's school, looking for clues to her social isolation.

Character Interactions

• Mai, Shuya, and Yukino interact as a group, with Mai feeling grateful for their presence and support.
• Shuya and Yukino work together to investigate Mai's school, showing their teamwork and concern for Mai.
• Shuya has a brief interaction with a boy who can see through his Strange Arts, marking him as an interesting individual to watch.

Key Plot Points and Events

• Shuya seeks information about Mai's strange phenomenon from students at her school.
• He meets Futaba Rio, a Half-Monster with exceptional intelligence but weak supernatural abilities.
• Rio shares the theory of observation from quantum mechanics as a possible explanation for Mai's situation.
• Shuya decides to seek external help, planning to go alone.

Character Developments

• Shuya shows interest in Rio's intelligence and considers potential future collaboration.
• Rio reveals her feelings for Shuya, though she's too embarrassed to admit it.
• Mai struggles with her helplessness in the face of her supernatural predicament.

Significant Themes

• The power of intelligence and knowledge (represented by Rio) over supernatural abilities.
• The importance of considering multiple perspectives and theories (quantum mechanics as a metaphor for uncertainty).

Character Interactions

• Shuya and Rio: They exchange contact information, and Shuya expresses appreciation for Rio's intellect.
• Shuya, Mai, and Yukino: They discuss Mai's situation, with Shuya and Yukino trying to cheer Mai up.
• Rio and Azusagawa: Rio's friend teases her about her feelings for Shuya, causing her embarrassment.

Key Plot Points and Events

• Shuya enters the Spirit Realm to visit the Heavenly God at Kitano Tenmangu Shrine.
• He seeks the Heavenly God's help regarding Sakurajima Mai's disappearance.
• The Heavenly God reveals that Mai's situation is related to recent strange incidents across Japan.
• Shuya decides to investigate the Supernatural Bureau about these incidents.
• After leaving the Heavenly God, Shuya writes down notes about Mai to prevent forgetting her again.

Character Developments

• Shuya demonstrates his concern and determination to save Mai, even seeking divine help.
• The Heavenly God shows his usual calm and knowledgeable demeanor, but also displays some confusion and forgetfulness.
• Monsters and other supernatural organizations gather around Shuya, showing both fear and hostility towards him.

Significant Themes

• The uncertainty and potential dangers of foreseeing the future.
• The power of divine beings and their limitations.
• The tension and mistrust between different supernatural factions.

Character Interactions

• Shuya interacts with the Heavenly God, seeking his help and receiving valuable information.
• Shuya is surrounded by monsters and other supernatural organizations upon returning to Tokyo, showing the tension and hostility between them.

Key Plot Points and Events

• Shuya meets with Director Abe and Deputy Director Ashiya of the Supernatural Bureau to discuss Sakurajima Mai's case.
• They discuss "Puberty Syndrome," a mysterious phenomenon affecting adolescents.
• Shuya learns about another Puberty Syndrome patient, Azusagawa Kaede, and visits her brother, Azusagawa Sakuta, to gather more information.

Character Developments

• Shuya demonstrates caution and strategic thinking in his meeting with the Supernatural Bureau.
• Azusagawa Sakuta shows maturity and concern for his sister's feelings when interacting with Shuya.

Significant Themes

• Puberty Syndrome: A mysterious phenomenon affecting adolescents, with no clear cause or solution.
• Bullying: A factor contributing to Puberty Syndrome, as seen in Azusagawa Kaede's case.

Character Interactions

• Shuya and Director Abe: They maintain a polite but guarded demeanor, with Shuya trying to extract information and Director Abe being evasive.
• Shuya and Azusagawa Sakuta: They have a brief but cordial conversation, with Azusagawa showing understanding and cooperation.

Key Plot Points and Events

• Shuya visits Azusagawa's house to investigate Puberty Syndrome.
• He learns that Azusagawa Kaede, Mai's classmate, is also affected by the syndrome.
• Shuya discovers that Mai's situation is accelerating due to observation.
• He shares his findings with Mai and Yukino, and they decide Mai should return to acting.

Character Developments

• Shuya: Shows initiative in investigating Mai's condition and offers a solution.
• Mai: Agrees to return to acting and meets with her mother to discuss it.
• Azusagawa Kaede: Revealed to be suffering from Puberty Syndrome.

Significant Themes

• The impact of observation on the future.
• The importance of mindset and environment in resolving Puberty Syndrome.
• The influence of public attention on Mai's condition.

Character Interactions

• Shuya and Azusagawa: Shuya investigates Azusagawa's sister without his knowledge.
• Shuya, Mai, and Yukino: They discuss Mai's situation and decide on a course of action.
• Mai and her mother: Mai arranges to meet her mother to discuss her return to acting.

Summary

Key Plot Points and Events

• Shuya decides to create a memorable event at Mai's school to help her stand out and prevent her from being forgotten.
• He seeks Little Senior Sister's help to compose music for the event.
• Upon returning to Mai's house, Shuya finds Yukino has also forgotten Mai, despite Shuya's immunity to the memory loss.
• Yukino leaves Mai's house, and Shuya is left alone with his thoughts.
• A hallucination of Rena appears, taunting Shuya about his past failures.

Character Developments

• Shuya: Struggles with the weight of responsibility and the fear of failure. His resolve strengthens despite the challenges.
• Yukino: Shows vulnerability and guilt after forgetting Mai. Her departure from Mai's house indicates her internal turmoil.
• Little Senior Sister: Remains steadfast in her support for Shuya, putting her other work aside to help him.

Significant Themes

• Memory and Forgetting: The theme of memory loss continues to be central, with even Yukino succumbing to it. Shuya's immunity remains unexplained.
• Responsibility and Failure: Shuya grapples with the responsibility he feels towards Mai and the fear of failing to protect her, as hinted by his hallucination of Rena.

Character Interactions

• Shuya and Little Senior Sister: Their bond deepens as they work together, with Little Senior Sister showing unwavering support.
• Shuya and Yukino: Their relationship becomes strained due to Yukino's memory loss and subsequent departure from Mai's house.
• Shuya and Rena (hallucination): The interaction highlights Shuya's inner turmoil and guilt regarding his past failures.

Key Plot Points and Events

• Shuya discovers that the Godhead of the Four Spirits of Heaven has a will of its own and can manifest as a separate entity.
• Mai's mother forgets her, leading Shuya and Mai to meet her at the beach, only for her to deny knowing Mai.
• Shuya decides to take Mai in and continues working on his music project with Little Senior Sister.
• Mai decides to continue going to school despite her mother's amnesia.

Character Developments

• Shuya: Shows determination and resilience in the face of adversity, continues to prioritize his music project while supporting Mai.
• Mai: Struggles with her mother's amnesia but maintains a strong front, decides to continue her daily life.
• Little Senior Sister: Shows dedication to their music project, supports Shuya and Mai.

Significant Themes

• Memory and identity: The theme of forgetting and being forgotten is explored through Mai's relationship with her mother.
• Perseverance: Shuya and Mai both show determination to continue their lives despite the challenges they face.
• Support and companionship: Shuya and Little Senior Sister support Mai, while Mai supports Shuya in his music project.

Character Interactions

• Shuya and Mai: Shuya comforts Mai and decides to take care of her after her mother's amnesia. Mai supports Shuya in his music project.
• Shuya and Little Senior Sister: They work together on their music project, showing mutual support and understanding.
• Mai and her mother: Mai's mother forgets Mai, leading to a strained and emotional interaction between them.

Key Plot Points and Events

• Shuya forms a band with Little Senior Sister and two middle-aged men (drummer and keyboardist) to prepare for a performance.
• They practice intensively, and Shuya returns home late, finding Mai studying.
• Mai asks Shuya to stay with her until she falls asleep due to her emotional state.
• In the middle of the night, Shuya suddenly feels overwhelming dizziness and sleepiness, leading him to fall asleep on the sofa after writing in his notebook.

Character Developments

• Shuya shows responsibility and dedication to his band practice and Mai's well-being.
• Mai opens up to Shuya, expressing gratitude for his support and asking for a kiss, but she falls asleep before Shuya can respond.
• Shuya demonstrates self-awareness and trust in his own actions, even when waking up in an unfamiliar situation.

Significant Themes

• Responsibility: Shuya takes on the role of caring for Mai and leading the band, showing dedication and commitment.
• Communication: The chapter explores the challenges of communication between Shuya and Mai, with Mai struggling to express her feelings and Shuya trying to understand and support her.
• Mystery and the Supernatural: The sudden onset of sleepiness and the notebook's contents hint at mysterious forces at work in the world.

Character Interactions

• Shuya and Mai: Their relationship deepens as Mai seeks comfort from Shuya, and Shuya tries to understand and support her.
• Shuya and the Band: They practice together, showing camaraderie and focus on their shared goal.
• Shuya and himself (through the notebook): Shuya interacts with his past self, trying to understand the message left behind.

Key Plot Points and Events

• Shuya finds a notebook with coded messages about Mai, revealing she's an idol and his childhood friend.
• He remembers Mai briefly, but she leaves before he can confirm their relationship.
• Shuya arranges an event at Minegahara High School for Friday and practices with Little Senior Sister.

Character Developments

• Shuya: Struggles to remember Mai, becomes determined to organize an event for her.
• Mai: Briefly interacts with Shuya, shows concern for him.
• Little Senior Sister: Remembers Mai, practices with Shuya for the event.

Significant Themes

• Memory and identity: Shuya's struggle to remember Mai and his past.
• Power dynamics: The mysterious power that affects people's memories.
• Preparation and determination: Shuya's resolve to hold the event for Mai.

Character Interactions

• Shuya and Mai: Briefly reunite, but Mai leaves before they can discuss their relationship.
• Shuya and Little Senior Sister: Practice together, grow closer.
• Shuya and Hanazawa Sakura: Interact briefly, with Sakura expressing concern for Shuya's well-being.

Key Plot Points and Events

• Shuya decides not to ask Sakura if she remembers Mai, as he already knows the answer.
• Shuya leaves without Sakura seeing him off.
• Shuya plans a small concert at Minegahara High School to make the students remember Mai.
• He calls various people to inform them about the event, including Haruno, Yukino, and the principal.
• The Monsters agree to help set up the stage.

Character Developments

• Shuya shows determination and confidence in his plan to help Mai.
• Sakura shows concern for Shuya but doesn't reveal it to Hikoo.
• Hikoo remains casual and uncaring, but he's secretly worried about Shuya.

Significant Themes

• Love and relationships (Shuya's feelings for Mai, Haruno's teasing, Hikoo and Sakura's dynamic).
• Perseverance and determination (Shuya's resolve to help Mai, despite the uncertainty of his plan).
• Communication and connection (Shuya reaching out to various people to watch the livestream, emphasizing the importance of shared experiences).

Character Interactions

• Shuya and Sakura: They have a silent understanding, with Sakura showing concern but not interfering.
• Shuya and Hikoo: They have a playful, bantering relationship, with Hikoo showing hidden worry for Shuya.
• Shuya and Mai: They share a playful, affectionate bond, with Mai teasing Shuya and Shuya being protective of her.

Key Plot Points and Events

• Shuya and his group prepare for a livestream at Minegahara High School.
• Monsters in human form gather to support Shuya, causing a commotion.
• Shuya and Little Senior Sister perform a love song for Mai on the high school's athletic field, livestreamed to millions of viewers.

Character Developments

• Shuya shows nervousness but determination in performing his first live concert.
• Little Senior Sister remains calm and supportive, but feels anxious about the performance.
• Mai, unaware of the livestream, continues her classes.

Significant Themes

• The power of music to bring people together and express emotions.
• The impact of Shuya's fame and the monsters' presence on daily life.
• The tension and excitement of performing live.

Character Interactions

• Shuya and Little Senior Sister support each other before the performance.
• Monsters in human form show their excitement and support for Shuya.
• Viewers on the livestream react to Shuya and Little Senior Sister's performance and interactions.

Key Plot Points and Events

• Shuya, with Little Senior Sister and two tool-guy uncles, performs on Minegahara High School's field, dispelling the Demonic Arts that had been keeping students indoors.
• He dedicates two songs to Mai, expressing his feelings and captivating the audience, including Mai and the entire school.
• Students rush to the field to watch the performance, creating a lively concert atmosphere.

Character Developments

• Shuya shows off his impressive singing and guitar skills, gaining the attention and admiration of the school.
• Mai realizes her feelings for Shuya, blushes, and is captivated by his performance.
• Little Senior Sister demonstrates her musical prowess and composes lyrics that directly express Shuya's feelings.

Significant Themes

• Love and relationships (Shuya's feelings for Mai, Mai's realization of her feelings, and the students' reactions to their dynamic).
• Music as a means of expression and connection (Shuya's songs captivate the audience and bring them together).
• The power of confession and honesty (Shuya's open declaration of his feelings for Mai).

Character Interactions

• Shuya and Mai: Their gazes meet, and Shuya dedicates songs to Mai, expressing his feelings openly. Mai blushes and is captivated by his performance.
• Shuya and Little Senior Sister: They work together musically, with Little Senior Sister composing lyrics that help Shuya convey his emotions.
• Students and Shuya: The students are drawn to Shuya's performance, cheering and singing along, creating a lively concert atmosphere.

Key Plot Points and Events

• Shuya and Little Senior Sister (Itai Seisen) perform a surprise concert at school, singing confessional songs, which goes viral and resolves Mai's Puberty Syndrome.
• The concert attracts media attention, with headlines sensationalizing Shuya and Mai's relationship.
• Shuya, Mai, and Little Senior Sister hold a meeting at Inoue Hikoo's company, surrounded by reporters and monsters for security.

Character Developments

• Shuya: He demonstrates his ability to handle unexpected situations and resolve Mai's Puberty Syndrome through a public concert. He also shows maturity by acknowledging his feelings for Mai and understanding their enduring friendship.
• Mai: She becomes more open about her feelings for Shuya after the concert. She also shows empathy and understanding towards Little Senior Sister and Yukino.
• Little Senior Sister: She finally learns the truth about Mai and Shuya's relationship and has an emotional breakdown, but she also shows resilience by comforting Mai and Yukino.

Significant Themes

• Communication and Understanding: The chapter emphasizes the importance of open communication and understanding between friends and lovers. Shuya and Mai finally acknowledge their feelings, while Little Senior Sister learns to accept their relationship.
• Public vs. Private Life: The concert and its aftermath highlight the tension between Shuya and Mai's public and private lives, as their relationship becomes a topic of public scrutiny and speculation.

Character Interactions

• Shuya and Mai: They finally express their feelings for each other through their duets, and Mai becomes more open about her love for Shuya. They also work together to comfort Little Senior Sister.
• Little Senior Sister and Mai/Yukino: Little Senior Sister clings to Mai and Yukino for comfort after learning the truth, and they all support each other emotionally.
• Shuya and Little Senior Sister: Shuya tries to take advantage of the situation to get a hug from Little Senior Sister, but Mai and Yukino's gazes stop him.

Key Plot Points and Events

• Shuya's agency signs Mai, causing a media frenzy.
• Shuya, Mai, and Little Senior Sister hold a press conference to clarify the situation.
• Hanazawa Sakura, Shuya's mother, excitedly imagines a future harem and plans to confront Mai's mother.

Character Developments

• Shuya: Shows maturity and responsibility in handling the media storm and protecting Mai.
• Mai: Remains calm and collected amidst the chaos, showing professionalism and trust in Shuya.
• Hanazawa Sakura: Exhibits her chuunibyou tendencies and overactive imagination, causing amusement and exasperation.

Significant Themes

• Media and Public Perception: The chapter explores how the media and public can misinterpret and exaggerate situations, causing unnecessary chaos.
• Family and Agency Dynamics: The interactions between Shuya, Mai, and Hanazawa Sakura highlight the complex dynamics within families and agencies.

Character Interactions

• Shuya and Mai: Their collaboration and mutual trust lead to a successful press conference, strengthening their professional relationship.
• Shuya and Hanazawa Sakura: Shuya's exasperation with his mother's antics contrasts with their shared determination to protect Mai's interests.
• Mai and Hanazawa Sakura: Mai's calm demeanor contrasts with Hanazawa Sakura's overactive imagination, leading to amusing interactions.