Chapter Summaries

Lina struggled with the fear that Mahiro had uncovered her identity, but during a school club tour he revealed that he had known she was Major Angelina Shields, the commander of STARS, since their first meeting. Lina attacked him to eliminate him, but Mahiro overpowered her and left her pinned against a wall.

• Lina confided to Sylvia that Mahiro's questions kept making her fear her identity had been exposed, then recommitted herself to her missions and her duty to cleanse STARS.
• Lina asked Mahiro to guide her around the school clubs, and he teased her about being in the Going-Home Club and wanting to know what he did after school.
• Mahiro asked Lina about Jian Shields and connected the name to her own, prompting her to attack him with a knife-hand strike.
• Mahiro revealed that he had known she was Major Angelina Shields, the commander of STARS, since they met at the shrine, and Lina dropped her disguise and threatened to eliminate him.
• Lina used a self-acceleration spell and attacked Mahiro with Molecular Divider, but he caught her hands, disrupted her magic with a knee strike, and pinned her against the wall.

Yotsuba Mahiro captured Lina and pressured her into revealing the USNA mission: investigate him and assassinate him if he proved dangerous. He left after using Lina’s concern for Sylvia to threaten her, while his encounters with Lina continued.

• Mahiro trapped Lina in a soundproofed corridor and forced her into an empty classroom.
• Mahiro threatened to expose Lina to the Ten Master Clans and invoke Kudo Retsu to make her talk.
• Mahiro threatened to read Lina’s memories with mental interference magic, and she revealed the USNA mission’s investigation and assassination objective.
• Mahiro joked that the USNA should send more women, including Sylvia, prompting Lina to insist he leave her subordinate alone.
• Mahiro left Lina and reflected that his mother’s information about Stars had proved useful.

Yotsuba Mahiro teased Angelina after they left an empty classroom, then joined his friends for lunch, where rumors about strange noises at school led them to plan a ghost hunt after class. Lina feared the rumor would expose what had happened in the classroom, and her alarm drew everyone’s attention.

• Mahiro and Angelina left the empty classroom together, and Lina angrily complained about him as they headed to the cafeteria.
• Mahiro and Lina joined their friends for lunch, where Mahiro claimed he had accompanied Lina to the infirmary and Lina reluctantly backed up his story.
• Erika teased Mahiro about his closeness with Lina and Sayaka, but Mahiro turned the teasing back on Erika and then declared his love for Sayaka.
• Mizuki told the group about rumors of sobbing sounds coming from an empty classroom, and Lina panicked because she recognized them as her own sounds.
• Mahiro suggested that the group investigate the noises after school, and Lina blurted out that they were crazy, drawing everyone’s attention.

Lina learned that the STARS fugitives had fled to Japan and were hiding in Tokyo, while a mysterious intruder broke into Yotsuba Mahiro’s home searching for compatible vessels. Mahiro and Minami defeated the intruder, whom Mahiro identified as an American, and he began to interrogate him.

• Lina returned home exhausted after investigating with Angelina and Yotsuba Mahiro, leaving Sylvia concerned about her condition.
• Benjamin Canopus contacted Lina with news that the STARS fugitives had landed in Yokohama and were believed to be hiding in Tokyo.
• A strange figure located three highly compatible vessels in a Tokyo residence and began an operation to capture or study them.
• The intruder broke through a window into Yotsuba Mahiro’s bedroom, where Mahiro struck him hard enough to send him crashing into a wall.
• Minami entered the room and blocked the intruder’s attack with an antimatter barrier, then Mahiro struck the intruder again and shattered his mask.
• Mahiro grabbed the badly injured intruder and smashed him into the floor, then recognized him as an American.

Yotsuba Mahiro and his allies repelled a coordinated series of attacks by parasitized former Stars members and learned that similar vampire-like assailants had killed dozens of people. The chapter ended with Mahiro meeting Mayumi Saegusa and Katsuto Jumonji to discuss the attacks and their possible connection.

• Mahiro recognized the attacker in his attic as Charles Sullivan, discovered a spiritual parasite inside him, and killed him after overcoming its attempt to weaken him.
• Mahiro joined Tatsuya and Miyuki at the Shiba residence, where Miyuki froze another attacker with Lamenting Styx and Mahiro decomposed the frozen spirit.
• Mahiro identified the attackers as former Stars members with inhuman structures inside their bodies, and Maya Yotsuba later told Hayama that she had killed attackers who targeted her abroad.
• The next day, Mayumi Saegusa and Katsuto Jumonji told Mahiro that vampire-like beings had killed twenty-four people and attacked the Saegusa family.
• Mahiro said that he, Minami, Miyuki, and Maya had also been attacked, leaving Mayumi and Katsuto astonished that the head of the Yotsuba family had been targeted.

Mahiro connected the vampire victims to users of AGV Enhancement Serum and went to question Lina about what she had been hiding. He arrived at Lina’s apartment, where Sylvia mistook his claim that he was Lina’s boyfriend for part of a mission cover, and invited him to dinner.

• Mahiro suspected the vampire victims shared a history of using AGV Enhancement Serum and decided to confirm his theory with Lina.
• Mahiro asked Kitayama Shizuku about vampire reports in the USNA, learned the incidents were centered around Dallas, and planned to visit her in America.
• Mayumi gave Mahiro Lina’s address, and he went to Lina’s apartment after deciding to investigate the USNA connection.
• Mahiro encountered Lina outside her building, teased her, and insisted on going upstairs to discuss what she had concealed from him.
• Mahiro introduced himself to Sylvia as Lina’s boyfriend, and Sylvia interpreted the claim as a mission cover and invited him to eat with them.

Yotsuba Mahiro teased Lina during lunch with Sylvia, then privately pressured her to keep cooperating while warning her not to reveal her STARS identity or mission. Later, he reviewed the operatives who had infiltrated Japan, leaving Lina humiliated and unable to resist him.

• Yotsuba Mahiro teased Lina throughout lunch while Sylvia mistook their behavior for ordinary affection.
• When Mahiro brought up Lina’s arrival from the USNA, Lina dragged him into her room and warned him not to expose her STARS identity or mission to Sylvia.
• Mahiro assured Lina he would keep her secret and reminded her of their earlier agreement, and Lina reluctantly changed into a short kimono and followed his directions.
• Mahiro told Lina that he had obtained a list of the STARS operatives who had secretly entered Japan, including operatives posing as magitech technicians at the Tokyo branch of the Maximilian Research Center.
• Lina refused to speak, and Mahiro continued teasing and handling her as she struggled to endure the humiliation.

Mahiro pressured Lina into explaining the USNA connection to the vampire attacks and asked how the parasites chose their hosts. Their conversation was interrupted when Sylvia arrived with Mia.

• Mahiro wore Lina down with his piano playing until she agreed to answer his questions.
• Lina admitted the vampires were connected to the USNA, estimating around ten, including Stars deserters and USNA military personnel.
• Mahiro revealed that Charles Sullivan had attacked his residence and that he had killed him without leaving a body.
• Mahiro asked whether the vampires targeted powerful magicians, and Lina confirmed that every known host had been an exceptional USNA magician.
• Sylvia knocked and announced that Mia had arrived, making Lina tense in Mahiro's arms.

Yotsuba Mahiro exposed Michaela Hongou as the infiltrator who had attacked his associates and restrained her when she tried to drain his strength. Lina and Sylvia realized that Michaela’s strangely calm behavior suggested something was wrong, leaving the confrontation unresolved.

• Lina and Mahiro emerged from the room, and Sylvia welcomed Mia, Lina’s friend and neighbor, into the sitting room.
• Mahiro examined Mia with the Eidos Eye, noticed something suspicious, and confronted her by tearing open her clothes to reveal a scar from the Watanabe family’s Child-Slaying Blade.
• Mahiro accused Michaela Hongou of being the companion who attacked people around him and slammed her against the wall.
• Lina tried to strike Mahiro with psion waves, but he blocked her with Phalanx and warned Michaela to stop draining his strength.
• Sylvia stopped Lina from approaching and privately pointed out that Michaela’s expression was unnaturally calm despite being strangled.

Yotsuba Mahiro killed the parasite possessing Mia and joined Lina’s team to hunt the remaining parasites. He took control of the hunt after destroying a target in a park, then called Uncle Gong.

• Yotsuba Mahiro snapped Mia’s neck, then froze and shattered the parasite that escaped her burning corpse.
• Lina agreed to cooperate with Yotsuba Mahiro and gathered STARDUST members to track the parasites at the Tokyo branch of the Maximilian Research Center.
• Lina briefed the team while Sylvia worried about Yotsuba Mahiro joining the hunt, but Lina said they had no choice.
• STARDUST members located a parasite in a park, and Yotsuba Mahiro appeared and froze it before ordering the team to find targets for him to kill.
• Yotsuba Mahiro called Uncle Gong after taking control of the hunt.

Yotsuba Mahiro received intelligence about the Parasites, eliminated the remaining ones in the Tokyo Area, and returned home to find information from Maya Yotsuba. Lina was reprimanded at the USNA embassy, while Mayumi Saegusa and Katsuto Jumonji questioned Mahiro about his actions and the USNA mission.

• Kuroba Mitsugu told Yotsuba Mahiro that twelve Parasites had been born from the USNA experiment and that one of the two remaining in the Tokyo Area had been located.
• Mahiro said he would eliminate the remaining Parasites himself, and Maya Yotsuba ordered Mitsugu to support him fully.
• Mahiro returned home after wiping out the remaining Parasites, and Minami gave him a sealed envelope of intelligence about the Vampire Incident from Maya.
• Lina faced a harsh interrogation at the USNA embassy over her failed mission and her failure to identify her Controller as a suspect.
• Mayumi asked Mahiro about hunting vampires with a STARS member, and Katsuto pressed him to disclose who the USNA had sent to Japan.
• Mahiro refused to reveal the USNA operative's identity because he had made a promise, then turned his attention to Kyoko Fujibayashi.

Mahiro discussed an anonymous report about the USNA’s demonic vampire experiment with Katsuto and the others, then left the vampire incident to the Ten Master Clans. At school, he asked Lina to leave the USNA and stay with the Yotsuba Family, leaving her stunned by his serious offer.

• Katsuto showed Mahiro and the others an anonymous USNA report blaming military magicians for the vampire incident, and said he would propose protesting at the Ten Master Clans conference.
• Mahiro left the discussion, and Erika, Mizuki, Miyuki, Honoka, and Sayaka complained that he had handled the danger without relying on them.
• Mahiro stopped Lina at school and asked why she was still there after her mission ended; Lina explained that her exchange period continued under orders from Colonel Virginia Balance.
• Lina apologized for losing her temper and admitted that her original target had been Mahiro.
• Mahiro asked Lina whether she wanted to leave the USNA and stay with the Yotsuba Family, promising they would help handle the consequences.

As Valentine’s Day approached, Yotsuba Mahiro wondered what gifts to give the people around him and prepared a magical bracelet for Minami. On the holiday, he received chocolates from Minami, Kyoko Fujibayashi, Sayaka, and his classmates, then accepted Honoka’s chocolates at the school’s confession spot.

• Mahiro asked Minami what she wanted for Valentine’s Day, but she said she would like anything he gave her.
• Kasumi and Izumi watched Mayumi make extremely bitter chocolate for Mahiro and worried about what she was preparing.
• Mahiro gave Minami a handmade bracelet with amber four-leaf clovers that could activate a powerful defensive formula, and Minami gave him chocolates.
• Kyoko Fujibayashi gave Mahiro obligation chocolates, calling them repayment for the vampire incident.
• Sayaka and Mahiro’s classmates gave him chocolates throughout the morning, and he gave Sayaka a ring in return.
• Honoka led Mahiro to the tree behind the Mechanical Research Club’s hangar and nervously offered him a box of chocolates, which he accepted.

Mahiro accepted Honoka’s Valentine chocolate and gave her a gardenia hair accessory, then accepted Lina’s homemade chocolate and gave her a protective bracelet. Later, Mayumi gave him her homemade honmei chocolate and urged him to taste it, leaving him nervously chewing the first piece.

• Mahiro thanked Honoka for liking him, accepted her chocolate, and gave her a gardenia hair accessory that made her blush and run off happily.
• Angelina confronted Mahiro after eavesdropping, then gave him homemade obligation chocolate, which he ate despite her warning that she was still investigating him and assigned to assassinate him.
• Mahiro gave Angelina a silver bracelet containing a magical formula to protect her during future missions, and she left studying it.
• Mayumi invited Mahiro to the school café and presented him with homemade honmei chocolate that smelled strongly of coffee.
• Mahiro questioned whether Mayumi’s chocolate could kill him, then unwrapped it and nervously ate a piece.

Mahiro and Mayumi shared bitter chocolates and exchanged a kiss before he gave her an emerald pendant. In Berkeley, Shizuku wandered away from a family banquet and sensed an invisible presence stalking her, which attacked as she activated vibration magic.

• Mahiro enjoyed Mayumi's bitter chocolate, and Mayumi kissed him while passing a piece into his mouth as punishment for being unfaithful.
• Mahiro fastened an emerald pendant around Mayumi's neck, and they kissed again.
• Shizuku slipped away from the Kitayama Family banquet and walked alone through Berkeley, thinking of Mahiro and her conflicted feelings about Honoka.
• A weakened, invisible entity sensed Shizuku's strong psion fluctuations and moved toward her, hoping to take refuge in her.
• Shizuku sensed she was being watched, challenged the presence, and activated vibration magic when a chilling force struck from behind, but her spell seemed to hit nothing.

Yotsuba Mahiro arrived in the USNA to spend Valentine’s Day with Kitayama Shizuku, giving her a jeweled brooch containing a subdued parasite. Shizuku returned his gift with premium chocolates, and the chapter ended as they encountered someone she called Tia, whom Mahiro recognized as Tina.

• Yotsuba Mahiro surprised Kitayama Shizuku on a USNA street, where she had mistaken him for an attacker and struck at him.
• Mahiro draped his coat over Shizuku and gave her a gold cross brooch with a blue gemstone that imprisoned a parasite.
• Shizuku took Mahiro to a Godiva shop and bought him the store’s finest chocolate as her Valentine’s return gift.
• Shizuku and Mahiro encountered someone Shizuku called Tia, and Mahiro reacted by saying, “Tina?”

Yotsuba Mahiro confronted Raymond S. Clark after Raymond claimed to be Shizuku’s boyfriend and pursued her, then kissed Shizuku to make clear that she was his fiancée. Later, Mahiro and Shizuku shared chocolates in a park, where Shizuku began hiccupping.

• Yotsuba Mahiro and Shizuku met Raymond S. Clark, who called Shizuku “Tia” and claimed to be her boyfriend.
• Mahiro stopped Raymond from reaching for Shizuku and introduced himself as her fiancée’s fiancé, warning Raymond not to disrespect her.
• When Raymond challenged him, Mahiro kissed Shizuku in front of him and then left with her.
• Shizuku thanked Mahiro in the park for helping her put an end to Raymond’s advances, and the two talked until late at night.
• Because the restaurants were closed and Shizuku was hungry, Mahiro offered to share her Valentine’s chocolate with her.
• After eating the chocolate, Shizuku began hiccupping and swaying beside Mahiro.

Drunk Kitayama Shizuku confessed her feelings to Yotsuba Mahiro and asked him for another kiss. The chapter then shifted to Raymond S. Clark, a high-school student secretly operating the Supreme Throne as one of the Seven Sages.

• Mahiro took the drunken Shizuku back to her relatives’ house, where she insisted he stay in her room.
• Shizuku changed into a nightgown in front of Mahiro and pulled him into her bed; he refrained from taking advantage of her and stayed when she clung to his clothes.
• Shizuku admitted she liked Mahiro despite feeling guilty because Honoka liked him too.
• Mahiro encouraged Shizuku to face her feelings and joked that he could make both girls his lovers.
• Shizuku called Mahiro cunning and fickle, confessed that she still liked him, and asked him to kiss her again.
• The narrative introduced Raymond S. Clark, who secretly used the Supreme Throne to search through intercepted communications as one of the Seven Sages.

Yotsuba Mahiro discovered that Raymond S. Clark had investigated him through the Supreme Throne and killed him from a distance before leaving Berkeley. Soldiers then surrounded Mahiro on a rooftop and arrested him for illegal entry, leaving his destination uncertain.

• Raymond S. Clark searched the Supreme Throne for information about Yotsuba Mahiro and decided to send his findings to the White House.
• Maya Yotsuba noticed Raymond's search and recognized his name and USNA connection.
• Mahiro said goodbye to Kitayama Shizuku after their night together and left her residence.
• Mahiro found Raymond in Berkeley and killed him with Night Demon from a rooftop seven kilometers away.
• Soldiers rappelled onto the rooftop, identified Mahiro, and ordered him to surrender for illegal entry.

Yotsuba Mahiro destroyed a USNA military base with Meteor Stream and forced the US president to accept his demands, then returned home to Miyuki and received her handmade chocolate. Months later, as the exchange program ended, Mahiro and Seitenshi discussed their future child and the possibility of living forever.

• Yotsuba Mahiro destroyed Military Base Twenty-Two with Meteor Stream, and USNA officials suspected him but were forbidden to investigate.
• Yotsuba Mahiro confronted the US president and left a bottle of Red Mercury as a threat before departing the White House.
• Yotsuba Mahiro returned home and found Miyuki waiting with handmade chocolate, which he accepted before giving her a snowflake-shaped hair ornament.
• Lina returned to the USNA and Kitayama Shizuku returned home as the exchange program ended.
• Seitenshi asked Yotsuba Mahiro what their child might be like and suggested that a daughter could inherit her name and eventually lead Arcadia.
• Yotsuba Mahiro told Seitenshi that their extended lifespans meant they could remain together and watch over Arcadia indefinitely.