Chapter Summaries

Himeragi Yukina and Kouzaka Sayaka enjoyed their new life on Gen Shima Island until a future girl resembling Yukina appeared and attacked them. The girl identified herself as Chu Zero Cai, Yukina and Chu Chen’s daughter from twenty-four years in the future, and warned that she had come to prevent a serious threat to the past.

• Yukina reflected on how much safer and happier her life with Sayaka had become since leaving the Lion King Organization.
• Yukina tried to wake Sayaka for school, and the two discussed their fear of Teacher Natsuki’s punishments.
• A naked girl who looked exactly like Yukina appeared and attacked, but Natsuki blocked her with spatial barriers.
• The girl excitedly greeted the household and called Natsuki, Nagisa, and others “aunties,” prompting them to object.
• The girl introduced herself as Chu Zero Cai, Yukina and Chu Chen’s daughter from twenty-four years in the future.
• Zero Cai explained that her mother had approved the time travel and that she had come to stop a threat that could affect Gen Shima Island and the past world.

Reina reunited with Chu Chen and explained that she had traveled back from the future while pursuing a world-destroying synthetic demon beast. As Agulla and the others went to investigate, Imperial Bureau operative Hisaki Kiriha arrived on Gen Shima Island, and Chu Chen asked Reina how dangerous the beast was.

• Reina said that future Natsuki spent most of her time at home wishing to be a slacker, while Chu Chen had to drag her out whenever help was needed.
• Reina reunited with Chu Chen and explained that a future organization had sent a powerful synthetic demon beast into the past to change history.
• Reina said the beast was built using the Twelve Ketsushin as a template and that its creators mocked Agulla as a zero-win-rate Fourth Progenitor.
• Hisaki Kiriha arrived on Gen Shima Island to investigate the unidentified demon beast and the island's recent abnormalities, planning to seek help from Agulla and Natsuki.
• Agulla vowed to defeat the beast and restore her future reputation, then took Nagisa with her while Fenrir followed at Chu Chen's request.
• Chu Chen asked Reina whether she had fought the demon beast and how strong it was, and Reina hesitated to answer.

Natsuki defeated the two-headed dragon with her spatial powers, briefly unleashing an uncontrollable force within herself. Meanwhile, Hisaki Kiriha began following Agulla and Nagisa, but Agulla was ambushed by an attack that left the surrounding area devastated.

• Reina told Chu Chen she had traveled through the River of Time using her Power of Time and had fought the monster there.
• Natsuki fought the two-headed dragon, whose Quicksilver of Dragon Serpent power devoured dimensions, and trapped its attacks in spatial vortices.
• Natsuki unleashed the Ketsushin-like power within herself, annihilated the space around the dragon, and then complained that the uncontrollable power was another problem child.
• Hisaki Kiriha recognized Agulla as the Fourth Progenitor and decided to follow her while investigating the monster and the Lion King Organization.
• Agulla reassured Akatsuki Nagisa about her strength, but Nagisa's doubts about her win record upset her.
• Agulla sensed an incoming attack, moved Nagisa out of danger, and summoned Twelfth Ketsushin: Alrescha Glacies as multiple elemental powers collided around them.

Agulla fought the sisters’ materialized familiars, but their battle threatened to destroy Gen Shima Island. Chu Chen arrived and erased the demonic beasts with a single attack that split the island apart, while Nangong Natsuki remained calm because she could restore it.

• Agulla blocked the familiars’ sneak attack and used Alrescha Glacies against the eleven demonic beasts, worrying that the battle would destroy Gen Shima Island.
• Chu Chen arrived, scolded Agulla for making such a mess, and dismissed Alrescha Glacies as it fought the remaining beasts.
• The demonic beasts charged Chu Chen, who unleashed a force that split Gen Shima Island into pieces and made the beasts vanish.
• Agulla and Akatsuki Nagisa panicked when Nangong Natsuki appeared, but Natsuki knew Chu Chen could restore the island.
• Natsuki noticed Fenrir nearby, who had been loafing instead of helping protect Agulla and Akatsuki Nagisa.

Chu Chen restored Gen Shima Island and everyone killed in the disaster, then Hisaki Kiriha revealed that she had come from the Imperial Bureau to deal with the demonic beasts. Back at Natsuki’s home, Yukina and the others returned after fighting another powerful enemy, and Natsuki asked La Folia what kind of demonic beast they had faced.

• Chu Chen used the Power of Time to restore Gen Shima Island and revive those who had died, leaving Hisaki Kiriha stunned by his power.
• Agulla explained that she had held back to protect the island, while Natsuki suspected the demonic beasts had targeted Agulla and Akatsuki Nagisa.
• Chu Chen called Hisaki Kiriha out of hiding, and she identified herself as an Imperial Bureau agent assigned to resolve the demonic beast incident.
• Hisaki Kiriha waited at Natsuki’s home while Agulla worked through the exam papers Natsuki had assigned as punishment for the island’s destruction.
• Yukina, Sayaka, Asagi, Yuma, Shion, and La Folia returned with Orphis after fighting demonic beasts, but Yuma confirmed that none of them had been injured.
• Natsuki asked whether they had faced demonic beasts modeled after the Fourth Progenitor’s divided familiars or the original demonic beast, and La Folia stepped forward to answer.

Ai discovered that a radical Imperial Bureau representative controlled the monster and planned to sink Gen Shima Island, while Chu Chen prepared to let Hisaki Kiriha abduct Nagisa and Shion so he could capture her. Natsuki received a mission ordering her to stay home and avoid interfering as the island’s fate depended on Chu Chen and Ai.

• La Folia explained that Orphis had restrained herself to protect Gen Shima Island and its people, and Natsuki praised her.
• An unnamed radical Imperial Bureau representative revealed his plan to destroy Gen Shima Island, capture Orphis’s friends, and use the monster to advance his country’s power.
• Ai and Little Jack secretly watched the representative, then Ai returned to Chu Chen with information about the Imperial Bureau’s plot.
• Chu Chen decided to let Hisaki Kiriha abduct Nagisa and Shion so he could capture her, and he said he would make her his fourth pet.
• Hisaki Kiriha received orders to abduct Akatsuki Nagisa and Yohane Natsune and prepared to obey them.
• Natsuki received a mission to stay in her room and not interfere with the monster rampage, then left the decision to the others.

Chu Chen sent his allies away so Hisaki Kiriha would attempt to abduct Nagisa and Shion, while secretly preparing to counter her. Kiriha took the girls outside, where Kiriyer confronted her with a gun and threatened to capture her.

• Chu Chen sent Yukina, Sayaka, and La Folia to search for someone, then took Yuma, Orphis, and Agulla to investigate the magical beast while leaving Kiriha with Nagisa and Shion.
• Kiriha agreed to stay behind and planned to abduct Nagisa and Shion, while Ai and Little Jack privately pitied her for walking into Chu Chen's trap.
• Natsuki worried that Kiriha had taken Nagisa and Shion, but Chu Chen assured everyone he had prepared for the situation.
• Kiriha led Nagisa and Shion outside and began gathering magic power to capture them.
• Kiriyer raised her gun at Kiriha and threatened her as she prepared to use magic.

Orphis fought the Imperial Bureau’s magical beast while Reina fixed Gen Shima Island’s River of Time to protect it from the battle’s destruction. Chu Chen went to outer space to investigate the beast’s familiar power, while Reina used a spare golden spear to weaken Yama’s Black Sword and Agulla and Yuma unleashed a devastating combined attack.

• Reina fixed Gen Shima Island’s temporal state with her golden spear, preventing Orphis’s attacks from destroying it.
• Orphis carried the magical beast into outer space, where her true dragon form overwhelmed its weapons and shattered asteroids in their clashes.
• Chu Chen recognized a familiar aura in the beast and suspected it contained power taken from the Twelve Ketsushin before teleporting to the outer-space battle.
• Reina revealed that Chu Chen had made her spare golden spears and used one to nullify Yama’s Black Sword’s gravity power.
• Agulla and Yuma joined forces with Alrescha Glacies and Spatial Collapse, causing the surrounding space to crack as freezing tornadoes swept through the battlefield.

Chu Chen defeated the magical beast alongside Orphis, absorbed its power, and reversed the solar system’s destruction. He left Orphis trying to imitate a surprised expression, while the group chat teased him about his companions.

• Orphis fought the magical beast in space, and Chu Chen used the Sixth Ketsushin to sever the nearby planets’ connection and protect Earth.
• Chu Chen used Three Thousand Great Thousand Worlds to separate the beast from its power, then Shaula Viola absorbed its magic.
• The system integrated Divine Power into Chu Chen’s abilities, granting him the Fourth Progenitor Template and several new powers.
• Chu Chen reversed time across the solar system, restoring the planets and rewinding the beast to before its creation.
• Orphis tried to make a surprised face after Chu Chen asked, prompting the group chat to mock her meme-like expression and tease Chu Chen.

After the magical beast incident was resolved, Chu Chen and the others gathered at Natsuki’s home, where Hisaki Kiriha awaited the cleanup. Kiriyer complained about being Chu Chen’s pet while Ai plotted harmless revenge, and Natsuki ended the chapter sitting beside Chu Chen as he secretly touched her hand.

• Haibara Ai reported that Yuma and Agulla had defeated the magical beasts by collapsing space and freezing the world, while Nangong Natsuki defended Yuma’s ability to handle the dangerous power.
• Kiriyer Florian arrived at Natsuki’s home as Chu Chen’s Pet No. 3 and annoyed Haibara Ai by teasing her about her appearance.
• Haibara Ai considered ways to prank Kiriyer but decided not to retaliate in a way that could genuinely harm or upset her.
• Kiriyer vented her anger about becoming a pet by eating more food as Yuma, Reina, Nagisa, Yukina, Ai, and Natsuki watched.
• A mischievous voice appeared, and Chu Chen touched Natsuki, who blushed and restrained herself from hitting him in front of the others.

Chu Chen confronted Hisaki Kiriha over the Imperial Bureau’s plan to destroy Gen Shima Island, then summoned Shizuka Yuyou to learn what the Lion King Organization knew. After he threatened to destroy the Imperial Bureau, Shizuka promised the organization would give him a satisfactory answer, while Diyaqi and the others felt the effects of genuine sunlight in Chu Chen’s world.

• Chu Chen declared that Hisaki Kiriha would become his household’s Pet Number Four and used his power to silence her when she resisted.
• Chu Chen accidentally teleported Shizuka Yuyou into the room while she was bathing, prompting a brief uproar before she got dressed.
• Shizuka Yuyou explained that the Imperial Bureau’s radicals planned to use the demonic beasts against Orphis, subdue Leviathan, and destroy Gen Shima Island.
• Chu Chen suggested that destroying the Imperial Bureau or its country would be trivial, and Shizuka promised the Lion King Organization would give him a satisfactory answer.
• Diyaqi noticed the difference between genuine sunlight and Chu Chen’s earlier imitation, while Yagami Kaguya said the Yamai felt no change and angered Diyaqi.

Diyaqi and the Yamai sisters nearly fought before Yuri and Kurumi calmed them down, while Kotori and Nia discussed the others’ whereabouts. Chu Chen returned to find Origami and Mukuro enduring the dark region’s despair to master their powers, then faced Kiriyer’s accusation over Hisaki Kiriha’s beast-girl outfit.

• Diyaqi attacked Yagami Kaguya and provoked Yuzuru, but Yuri and Kurumi stopped the Spirits from fighting by reminding them Chu Chen would object.
• Kotori told Itsuka Shiori that Origami and Mukuro had entered the Digital World’s dark region, while Sa wa went out with Tohka and Miku went to perform for the Cursed Children.
• Nia assured Shiori that Origami and Mukuro were fine, and Chu Chen’s voice confirmed he was watching over them.
• Origami and Mukuro fought through despair and unleashed powerful attacks in the dark region as Tengu Mio monitored them and promised to intervene if necessary.
• Chu Chen returned, and Kotori teased him about Hisaki Kiriha’s beast-girl outfit while Kiriyer looked for Amitia.
• Hisaki Kiriha struggled with shame over the outfit but found herself unable to resist Chu Chen.

Chu Chen brought Hisaki Kiriha to his world, where Kotori took her in and offered to look after her. Meanwhile, Kiriyer returned to Amitia, and a message from Shirai Kuroko revealed that Academy City's chairman had come looking for them.

• Chu Chen controlled Hisaki Kiriha's body and made her put on a beast-girl outfit while Kotori and the others watched.
• Kiriyer teased Chu Chen and left to visit Amitia, while Kotori took Hisaki Kiriha in to protect and help her.
• Chu Chen agreed that Kotori and Shiori would look after the children, and Nia complained that he had ignored her.
• Amitia welcomed Kiriyer back and asked about her experience with Chu Chen, but Kiriyer denied that anything had happened.
• In the group chat, Shirai Kuroko announced that Academy City's chairman had come looking for them, and Misaka Mikoto reacted anxiously.

Chu Chen learned that Alester had summoned Misaka Mikoto and Shirai Kuroko after their unusually powerful interventions drew attention, and he prepared to meet them. Mikoto and Kuroko arrived at the windowless building, while Last Order and Index were left behind with Musujime Awaki and an unpaid breakfast bill.

• Chu Chen concluded that he had no irreconcilable conflict with Alester and could potentially offer him a replacement for the Misaka Sisters, but he remained wary of the Demon Gods.
• Misaka Mikoto and Shirai Kuroko explained that Mikoto had knocked a Saint flat and Kuroko had banished a green-haired man, prompting Chu Chen to warn them that their power had attracted Alester's attention.
• Chu Chen told Mikoto and Kuroko to try talking to Alester and said he would come over, while Mikoto worried that he might be harmed because of her.
• Misaka Mikoto and Shirai Kuroko took Last Order and Index out for breakfast, after having rescued the Sisters and given the two girls a place to stay.
• Musujime Awaki arrived and announced that Alester wanted to see Mikoto and Kuroko, who used their spatial abilities to leave without paying for breakfast.
• Misaka Mikoto and Shirai Kuroko appeared inside the windowless building, where Alester greeted them.

Misaka Mikoto and Shirai Kuroko confronted Alester, who wanted to learn how they had gained power beyond his plans. Chu Chen arrived and offered Alester goods from other worlds, leaving Alester interested in trading with him.

• Misaka Mikoto and Shirai Kuroko entered Alester’s hidden chamber and found him suspended in a life-support tank.
• Alester revealed that he knew the two had defeated Accelerator and a Saint and had left their world, then demanded to learn what they had encountered.
• Chu Chen appeared, explained that he had brought Mikoto and Kuroko to his auction, and offered to trade with Alester.
• Chu Chen showed Alester a Space Orb that could help him comprehend the Power of Space, and Alester asked about the next auction and its currency.
• Misaka Mikoto reflected on the danger Alester posed and on how Chu Chen had helped her uncover Academy City’s secrets and her more than twenty thousand sisters.

Chu Chen revived the Misaka Sisters whose corpses Mikoto had found and brought the sisters into his world, where Kotori was left to manage them. Mikoto discovered that the Misaka Network could communicate across worlds only because Chu Chen permitted it.

• Kuroko stopped arguing after Mikoto warned her, while the group discussed how overwhelmingly powerful Chu Chen's opponent was and teased Kurumi about her relationship with him.
• Index ate through Awaki's monthly bonus, and Chu Chen considered arranging an eating contest with her, Artoria, and Tohka.
• Mikoto asked Chu Chen to take in the Misaka Sisters and study the AIM Diffusion Field, explaining that she trusted him more than Academy City's leadership.
• Mikoto showed Chu Chen nearly ten thousand mutilated Misaka Sisters' corpses, and he used Return of Life to revive them as Alester watched and wondered whether Chu Chen could revive his daughter.
• Chu Chen moved the revived sisters into his world, leaving Kotori responsible for overseeing them, and allowed the Misaka Network's information to pass between worlds.

Chu Chen traded Alester a crystal that could replace the Misaka Sisters in expanding the AIM Diffusion Field, gaining influence in Academy City and an end to the Ability Evolution incident. As Mikoto and Kuroko prepared to show him around, the story shifted to Gensokyo, where Eirin found Kaguya gaming through the night.

• Alester met Chu Chen to discuss compensation, and Chu Chen showed him a crystal capable of replacing the Misaka Sisters' role in expanding the AIM Diffusion Field worldwide.
• Chu Chen asked Alester for an influential identity in Academy City and for the Ability Evolution incident to end; Alester agreed.
• Mikoto and Kuroko questioned Chu Chen about his deal with Alester, then offered to guide him around Academy City and introduce him to their friends.
• Kuroko worried that Mikoto was becoming interested in Chu Chen, while Chu Chen considered his new Magic Mastery and the origin of his System Creator.
• Eirin found Kaguya in her room after she had stayed up all night gaming, and Kaguya asked to sleep for five hundred years.

Kaguya discovered that a game system had turned her into a Level 1 Gap Yokai while retaining her Moon Person abilities, drawing Yukari Yakumo’s attention. Eirin kept Yukari from learning how the change happened, and Kaguya was left eager to explore the system.

• Eirin scolded Kaguya for staying up all night and threatened to confiscate her games, but Kaguya refused to leave the kotatsu.
• Mei Hong arrived and fought Kaguya after Kaguya called her a turkey and a poor gaming opponent.
• A game system appeared, and Kaguya drew the Gap Yokai race while viewing Mei Hong’s and Yukari Yakumo’s levels.
• Yukari Yakumo came to Eientei after sensing another Gap Yokai and asked Kaguya how she had changed races.
• Eirin refused to reveal anything about Kaguya’s transformation, and Yukari retreated through her gap.

Remilia joined the System Network, received a Life Completion Potion, and used it to reverse the fates of several Scarlet Devil Mansion residents. After learning how to earn Destiny Reversal Value, she decided to change Reimu Hakurei’s fate, while Chu Chen warned Mikoto and Kuroko to take the potion one drop at a time.

• Remilia and Housenki Kaguya joined the System Network and recognized each other as the Scarlet Devil Mansion’s loli and Eientei’s otaku princess.
• Remilia found that her future fate had become unobservable, then received a Life Completion Potion from the Administrator.
• Patchouli confirmed the potion could help everyone in the Scarlet Devil Mansion, and its use reversed the fates of Patchouli, Sakuya, Flandre, and Hong Meiling.
• Remilia learned she had gained 10,000 Destiny Reversal Value and decided to rewrite Gensokyo’s fate, starting with Reimu Hakurei.
• Chu Chen told Mikoto and Kuroko to drink only one drop of the Life Potion each day and explained its benefits beyond healing.

Chu Chen connected Shokuhou Misaki to the Physical Training System and promised he could revive Tōri. After Misaki received a potion from him, Tōri began to wake from her deathlike state.

• Mikoto and Kuroko stored their Life Potions after realizing how powerful they were.
• Chu Chen studied Magic Mastery and considered the dangers of absorbing Index World's grimoire knowledge.
• Chu Chen connected the Physical Training System to Shokuhou Misaki in the past timeline.
• Misaki accepted the system's Beginner's Gift Package, which raised all her attributes and strengthened her control over her ability.
• Misaki resolved to take control of the Artificial Room, and Chu Chen appeared and gave her a green potion, promising he could revive Tōri.
• Tōri recalled her final moments with Misaki, then heard Misaki calling to her as her weakness began to disappear.