Chapter Summaries

Mahiro resolved a school dispute between Ayako and Kasumi, then learned that Miori Shiba had invited him to a Kitayama Family business banquet. He attended with Miyuki and Minami, where Miori greeted him enthusiastically and began leading him to meet the hosts.

• Mahiro stopped Ayako and Kasumi's argument and warned them not to use magic at school again.
• Minami apologized for forgetting to tell Mahiro about the banquet invitation from Miori Shiba.
• Mahiro invited Miyuki to accompany him to the Kitayama Family's business banquet and brought Minami along.
• At the banquet, Mahiro and Miyuki met Mayumi and Mari, who were surprised to see them there.
• Miori Shiba arrived, embraced Mahiro, and led him toward the banquet's hosts.

Mahiro spoke privately with Kitayama Akane at the family banquet, warning her against a marriage alliance with the Clark Family and admitting his role in Raymond Shez Clark’s disappearance. Akane approved of his willingness to take responsibility and, despite questioning his intentions toward Shizuku and Honoka, agreed to entrust both girls to him as Ushio approached.

• Kitayama Akane told Mahiro about the Kitayama Family’s relatives and criticized them for bringing outsiders to the banquet.
• Mahiro warned Akane that a Clark Family alliance could endanger the Kitayama Family, then admitted he had caused Raymond Shez Clark’s disappearance when she asked as Shizuku’s mother.
• Mahiro explained that Raymond was dangerous because of his family’s ties to the USNA military and argued that an international marriage alliance could put the Kitayama Family in a difficult position.
• Akane teased Mahiro about being Shizuku’s boyfriend and asked whether he intended to accept Honoka; Mahiro said he did and would give all the girls he loved proper status after graduation.
• Akane warned Mahiro never to mistreat Honoka and said she and Ushio would entrust Shizuku and Honoka to him before Ushio came over.

Mahiro reassured Honoka and Shizuku that he would not give up on either of them, then learned that Maya had acknowledged Miori Shiba as her daughter and agreed to consider a job for her. He followed Miori to Shiba Heavy Industries’ headquarters with Miyuki and Minami.

• Mahiro led Honoka and Shizuku to a balcony, embraced them, and said he wanted to be with both of them if they were willing.
• Miori Shiba arrived, and Mahiro learned that Maya Yotsuba had acknowledged her as a daughter.
• Mahiro offered Miori an interesting job, then left the Kitayama residence with Miyuki and Minami.
• Miori took them to Shiba Heavy Industries’ remote headquarters, where Miyuki declined her offer to rest in the company lounge.

Mahiro arranged for Shiba Heavy Industries to modify the National Guardian Machine God and conceived a way to revive Yotsuba Miya. That night, he entered the Yotsuba Family cemetery, where the chapter left him among the family’s graves.

• Miori Shiba showed Mahiro and Miyuki Shiba Shiba Heavy Industries’ underground testing facility, where Mahiro summoned the National Guardian Machine God and asked her to reinforce and upgrade it.
• Miori Shiba agreed to help modify the mech, and Mahiro left the facility with Miyuki and Minami.
• On the drive home, Mahiro considered Yotsuba Miya’s death and realized he might be able to revive her by regressing her and replenishing her vitality and mental power.
• Miyuki told Mahiro that she would say how much she missed her mother if she could see her again, and Mahiro said he thought she would have that chance.
• At school, Honoka’s classmates noticed her change and teased her about being in love, while she stayed silent and shy.
• That night, Mahiro slipped into the Yotsuba Family cemetery and passed the graves of its ancestors.

Mahiro restored Yotsuba Miya’s body and spirit from her remains, though she remained comatose while he went to school. After he left, Miya awakened in his room and wondered where she was.

• Mahiro used Shambhala to retrieve Yotsuba Miya’s skeleton from her grave and brought it to his bedroom.
• Mahiro used Night Demon and his information-body regression to restore Miya’s body, then injected her with a strengthening serum to revive her spirit.
• Miya did not wake, so Mahiro let her sleep beside him and went to school the next morning with Minami, Miyuki, and the others.
• After Mahiro left, Miya opened her eyes and found herself in an unfamiliar room.

Yotsuba Miya woke after being dead for three years and discovered that Mahiro had revived her. He told her that her husband, Shiba Tatsurou, had remarried, then persuaded her to go see for herself by wagering that she would belong to him if he was telling the truth.

• Yotsuba Miya woke naked in a locked room and realized she had been kidnapped.
• Mahiro entered and explained that Maya Yotsuba had released him from the Fourth Laboratory and that he had revived Miya after her death three years earlier.
• Miya doubted that Mahiro could restore a deteriorated mental body, but his confidence made her consider that he might have succeeded.
• Mahiro told Miya that Shiba Tatsurou had remarried in the year she died, and proposed a wager about whether it was true.
• Miya agreed to go verify Mahiro's claim, then ordered him to leave while she changed into the dress he had produced.

Yotsuba Mahiro introduced the resurrected Yotsuba Miya to Sakurai Minami and explained that he had altered Miya’s body with a serum from another world. He drove Miya to Four Leaves Technology’s R&D division, where Shiba Tatsurou and Sayuri were inspecting the facility, and stopped her from getting out in her revealing outfit.

• Yotsuba Miya put on black cutout lingerie, and Sakurai Minami was startled to see her emerge from Yotsuba Mahiro’s room.
• Mahiro introduced Miya to Minami as Yotsuba Maya’s older sister and instructed Minami to keep Miya’s return secret from Maya.
• Mahiro and Miya drove toward FLT, where Miya recalled his past at the Fourth Laboratory and asked whether he had changed her body.
• Mahiro told Miya that he had injected her with a body-enhancement serum from another world and that its Demon Extract genes had given her ice powers.
• Mahiro arrived with Miya at Four Leaves Technology’s R&D division, and he stopped her as she tried to exit the car in her lingerie.

Yotsuba Miya and Mahiro secretly watched Shiba Tatsurou and Konoha Sayuri at FLT, where Sayuri tried to persuade Tatsurou to replace Miyuki’s guardian. Miya discovered that Tatsurou had never loved her, and after Mahiro offered to handle the aftermath, she used mental interference magic to attack the pair.

• Mahiro concealed himself and Miya with optical camouflage and led her into the FLT building to spy on Tatsurou and Sayuri.
• Sayuri and Tatsurou discussed FLT’s profitable orders and argued about Tatsuya’s role and Miyuki’s guardian.
• Sayuri sat on Tatsurou’s lap and urged him to have Mahiro replace Miyuki’s guardian, revealing that she wanted Mahiro involved.
• Tatsurou told Sayuri that he had never loved Miya and had fallen in love with Sayuri twenty years earlier, leaving Miya furious and disappointed.
• Mahiro offered to help Miya handle the aftermath, and she used mental interference magic to seize Tatsurou and Sayuri’s Gates as an icy chill spread through their perceptions.

After punishing Shiba Tatsurou and Konoha Sayuri, Yotsuba Miya told Mahiro about her past and urged him not to make the Yotsuba his enemy. Back at Mahiro’s room, Miya faced the prospect of sharing his only bed.

• Miya explained that she had stripped Shiba Tatsurou of his physiological emotions and made Konoha Sayuri’s remain constantly active.
• Miya revealed how Maya’s trauma in 2062 led her to alter her sister’s memories, damaging their relationship and ruining her own health.
• Miya recounted her marriage to Shiba Tatsurou, the unusual births of Shiba Tatsuya and Miyuki, and the Yotsuba Family’s creation of Guardians.
• Mahiro admitted that his original plan had been to revive Miya partly to deal with Shiba Tatsurou, though he claimed his purpose had since changed.
• Miya promised not to interfere with Mahiro and urged him not to treat the Yotsuba as enemies, but he dismissed her claim that Maya loved him.
• After they returned, Mahiro took Miya to his room and offered her a place beside him in his only bed.

Mahiro grew closer to Miya as she began to accept him as family, while Maya dealt with the fallout from Sayuri and Tatsurou’s divorce and confronted Mahiro about his role in their downfall. Maya learned that Mahiro wanted Four Leaves Technology to cooperate with Shiba Heavy Industries on the Nation-Protector Divine Machine, but she promised to protect him and let his remaining secrets lie.

• Miya tucked Mahiro into bed and stroked his hair, realizing that her resurrection had restored feelings she had lost and that she was transferring her maternal affection onto him.
• As days passed, Miya became more involved in Mahiro’s life, while Sayuri’s affairs and Tatsurou’s discovery of them led to their divorce.
• Maya rejected Sayuri’s demand for half of Tatsurou’s FLT shares and arranged for Sayuri to be imprisoned for embezzling company funds.
• Maya showed Mahiro surveillance evidence placing his car at FLT and accused him of orchestrating the events that brought down Sayuri and Tatsurou; Mahiro admitted it.
• Mahiro explained that he wanted to keep FLT out of outsiders’ hands and arrange deeper cooperation with Shiba Heavy Industries, and Maya identified the project as the Nation-Protector Divine Machine.
• Maya said she would stop probing Mahiro’s secrets and promised to protect him.

Mahiro transferred Four Leaves Technology to Miyuki and explained to Miya why he wanted her to lead the Yotsuba Family, while Miya continued to indulge and care for him. As the Nine Schools Competition approached, its officials barred Mahiro from every event except Steeplechase, and First High School’s students debated how to respond.

• Mahiro refused Maya’s offer to transfer Four Leaves Technology and Shiba Tatsurou’s shares to him, directing her to transfer them to Miyuki instead.
• Miya questioned Mahiro’s intentions, and he said the Yotsuba Family had been doomed since Maya let him out of the Fourth Laboratory and that he wanted Miyuki to become its head.
• Miya accepted Mahiro’s need for comfort and continued caring for him as their relationship grew increasingly intimate.
• The Nine Schools Competition changed several events and prohibited Mahiro from participating in anything except Steeplechase.
• Mari and Mayumi teased Mahiro about the restriction, while Miyuki challenged the fairness of barring him from competition.

Miyuki and First High’s students objected to rules they viewed as targeting Mahiro, who agreed to support the competitors as a technician and recommended Mibu Sayaka for the cross-country obstacle race. As the Nine Schools Competition approached, Mahiro invited Yotsuba Miya to attend so she could see Miyuki, and Miya agreed.

• Miyuki angrily condemned the competition rules, but calmed down at Tatsuya’s urging, while Hattori Gyobu and Ichihara Suzune encouraged Mahiro to protest by competing and winning.
• Mahiro said he would tune CADs and provide tactical guidance for half the competitors so they could win championships, and recommended Mibu Sayaka as a competitor.
• At the station café, Mahiro reassured Sayaka that she could handle the cross-country obstacle race, and she agreed to do her best.
• Mahiro returned home early and told Yotsuba Miya that he would leave for the competition in two days and be away for more than ten days.
• Mahiro invited Miya to attend the Nine Schools Competition and see Miyuki; Miya agreed despite her concerns about the Yotsuba Family.

Yotsuba Mahiro returned to the Nine Schools Competition as technical staff, where news of Esdeath’s European war raised concerns about Tatsuya’s military service. At the opening banquet, Mahiro noticed a striking Second High School student who resembled him and Miyuki, before Kyoko Fujibayashi interrupted his thoughts.

• After spending the night with Yotsuba Miya, Mahiro met the contestants and took responsibility for adjusting their CADs and devising tactics.
• On the bus to the competition, Tatsuya showed Mahiro news that Europe had erupted into war, and Mahiro recognized Esdeath in the accompanying photograph.
• Mahiro warned Tatsuya to leave the Independent Magic-Equipped Battalion if a world war broke out, mentioning Miyuki and promising to intervene if necessary.
• At the opening banquet, Mahiro noticed a beautiful Second High School student who looked almost exactly like him and Miyuki.
• Kyoko Fujibayashi approached Mahiro and asked what he had been looking at.

Mahiro met Minoro Kudou, then tuned CADs for competitors in the steering-and-shooting event before the Nine Schools Competition began. On the first day, the Saegusa sisters, Honoka and Shizuku, and the Kuroba siblings performed strongly, while Mahiro found the Shield Down arena surprising.

• Kyoko Fujibayashi introduced her cousin Minoro Kudou to Mahiro and Minami, and Minoro asked them to call him by his given name.
• Masaki Ichijo greeted Mahiro, and the banquet began without incident before competitors prepared for the next day's events.
• Mahiro adjusted CADs for Izumi and Kasumi Saegusa, then tuned Ayako and Fumiya Kuroba's devices as the two groups traded teasing remarks.
• Kasumi, Izumi, Ayako, Honoka, and Shizuku showed Mahiro their swimsuits before heading to the competition venue.
• The first day's steering-and-shooting event began, and Izumi, Shizuku, and the Kuroba siblings impressed the audience with their performances.
• Mahiro watched the Shield Down event and found its arena surprising.

Yotsuba Mahiro’s technical plans helped Airi Isshiki and other competitors advance at the Nine Schools Competition, while Arcadia’s members gathered to cheer him on. After Seitenshi told him that someone resembling Maya had arrived, Mahiro found Yotsuba Miya and watched Miyuki’s match beside her.

• Airi Isshiki thanked Mahiro for his tactical plan after winning her Shield Down match, and he promised to prepare new strategies for her upcoming rounds.
• Kitayama Shizuku shattered her opponent’s ice pillars with Earth Tremor, while the Saegusa sisters, Kitayama Shizuku, and Honoka dominated Battle Board and Ayako and Fumiya reached the semifinals.
• Erika, Mizuki, Mayumi, Mari Watanabe, Seitenshi, Kisara Tendo, Lina, and other members of Arcadia arrived to cheer Mahiro, and Lina explained that she had no intention of returning to the USNA.
• Seitenshi told Mahiro that someone who looked like Maya was nearby, so he left the group to find her.
• Mahiro found Yotsuba Miya wearing a sunhat and sat beside her to watch Miyuki compete.

Mahiro brought Yotsuba Miya to Miyuki after her victory in the Nine Schools Competition, and mother and daughter reunited after years apart. Miya declined to meet Tatsuya for now and listened as Miyuki told her about her father's remarriage.

• Mahiro took Yotsuba Miya from the stands to watch Miyuki's match up close.
• Miyuki defeated her opponent with Inferno of Ice and Flame and won her first match.
• Mahiro led Miyuki into the passageway, where she recognized Yotsuba Miya and embraced her.
• Miyuki realized Mahiro had brought her mother back and thanked him for reuniting them.
• Miya said she was not ready to see Tatsuya, and Miyuki told her that her father had remarried.

Yotsuba Miya reunited with Miyuki at the Nine Schools Competition, while Mahiro arranged for Miya to meet Maya after the event. After Miyuki won Monolith Code and Mahiro comforted Shizuku, Honoka confronted him about their relationship and declared that she wanted to be with him.

• Yotsuba Miya warned Mahiro not to use Miyuki's gratitude to manipulate her, and they agreed he would keep their arrangement secret from Miyuki.
• Miya stayed at the competition to watch Miyuki, and Tatsuya began to suspect who she was.
• Miyuki defeated Shizuku in the Monolith Code final and won the championship.
• Shizuku spent the night with Mahiro after seeking his comfort, and Honoka later confronted him about it.
• Honoka asked why Mahiro would not accept her, and he kissed her and admitted he had been unsure how to treat her.
• Honoka said she would not regret choosing him and threw herself at Mahiro.

After First High won the Nine Schools Competition, Maya Yotsuba contacted Mahiro about the Parasite-powered automatons and revealed Kudo Retsu’s role in creating them. The conversation ended with Maya asking when Mahiro would visit her during summer break.

• Honoka’s changed, affectionate behavior drew her friends’ curiosity, while First High’s competitors continued winning and built a large lead in the Nine Schools Competition.
• Sayaka competed in Steeplechase, easily defeated the course’s obstacles, and finished the five kilometers in under ten minutes, astonishing spectators and officials.
• First High defended its Nine Schools Competition championship, and summer break began.
• Maya showed Mahiro a photograph of an automated doll, and he identified it as being powered by a Parasite and suspected the Kudou Family’s involvement.
• Maya confirmed that Kudo Retsu had developed the automatons for Minoro Kudou, said she had already asked Tatsuya to handle the matter, and invited Mahiro to visit her.

Mahiro returned to Mashima Island with Miya, where she reunited with her younger sister, Maya, after many years apart. Maya confronted Miya privately about her relationship with Mahiro and accused her of taking her child away from her.

• Maya told Mahiro she had discovered Miya was with him and said she wanted to see her older sister.
• Miya worried during the flight to Mashima Island about facing Maya after becoming involved with Mahiro.
• At the airport, Maya welcomed Miya, while Mine and Minami met and eyed each other warily before Mahiro introduced them as his maids.
• Maya, Miya, and Mahiro rode together to the Yotsuba Estate, where Maya sent Mahiro away so she and Miya could speak privately.
• Maya asked Miya about her relationship with Mahiro, then recalled that Miya had once killed her and accused her of trying to take Maya's child away.

Maya and Yotsuba Miya fought over their bitter history, unleashing powerful magic that destroyed the manor while Mahiro and the others watched from safety. Mahiro stopped the sisters before they could continue their fight by hand.

• Maya accused Yotsuba Miya of having killed her and unleashed her Meteor Shower magic in the study.
• Yotsuba Miya answered with her own magic, and the sisters began an all-out battle.
• Mahiro told Seitenshi about the sisters’ history while Mine and Minami competed to serve him tea.
• The sisters’ magic caused an explosion that destroyed the manor, but Mahiro protected the people in the living room with Phalanx.
• Maya and Yotsuba Miya prepared to fight with their fists until Mahiro stepped between them and stopped them.