Taichi Yaegashi/Story Plot

Hito Random arc
When Taichi first heard about the body-swapping phenomenon from Yui and Aoki, he also dismisses it as a joke like the other two members of the StuCS club. However he soon believes the phenomenon when he personally experiences the ‘body-swap’ first hand with his classmate, Iori. After escaping from the clutches of their class representative, Fujishima, Taichi and Iori finally regain their bodies after trying to convince Inaba to believe their story.

It was not until the next day that Taichi learns that the body-swapping phenomenon was still occurring and learn that their club adviser, Gotou, has been briefly taken over by the supernatural sentient called Heartseed; the perpetrator of the whole affair. The club member tries to oppose Heartseed but failed in their attempt, witnessing how futile they effort is against this foe. A few days later, Taichi and the rest of the StuCS would meet at Inaba’s house to discuss how they are handling the phenomenon. When it was time for everyone to return home, Taichi learns of Iori's concern that they will eventually lose sight of their identities is the phenomenon persists.

The next day, Taichi tries to volunteer himself for the cleaning job asked by Fujishima, however, to Inaba's dismay, Taichi switches body with her at the last moment and therefore brings her along to help as well. When the two later regain their bodies, Inaba confronts Taichi on his feelings for Iori. Taichi hears from Inaba that that Iori is very fragile and will need someone to protect her. Taichi tries to be positive that everything will be fine, however his attitude annoys Inaba. They both later apologize and continue their work.

Taichi and Aoki would later abuse the trust of their friends by recording themselves while in the bodies of Inaba and Yui, respectively. They are caught by the two girls and punished appropriately. It was after this that Taichi and Aoki discover that Yui has Androphobia, which Inaba confirms as she already knew. As the two friends return home, Aoki admits to being jealous of how Taichi is better at taking care of Yui than him. Later that night, Taichi meets up with Yui at a park when they swap bodies with each other at their homes. After learning of the origins of Yui's androphobia, Taichi teaches Yui a man's most vulnerable weakpoint by punting her (while in his body) in the crotch. This act gets Yui on the track towards overcoming her phobia.

At school the next day, Taichi is confronted by the other three StuCS members when they notice Yui being in higher spirits and Inaba suddenly faints in front of him. After having her rest at the school infirmary, Iori and Taichi escort Inaba home and Taichi reveals how he helped Yui. After returning Inaba home safely, Taichi and Iori relocate to the riverbank where he learns of Iori’s problem with her persona changing. After listening, Taichi promises Iori that he will always recognize her for who she is.

On another school day, Taichi and Inaba swap bodies and Taichi experiences firsthand in what poor shape Inaba's body is in. After bring Inaba to the StuCS clubroom to rest, Taichi confronts Inaba on her problem. Defeating Inaba in their argument, Taichi learns that she is overly insecure of herself, and she confesses that she has literally been worried sick of whether she can fully trust people, including her friends. Taichi tells Inaba that her friends will always accept her and tries to convince her that their friendship will not change even if she tells them this information. To help Inaba believe, Taichi voluntarily tells her one of his darkest secret. Inaba was amazed by the stupid confection that Taichi told her, and was touch on much he fully believe in her. So as promise, Taichi watches as Inaba tell the other StuCS members that she had trouble trusting her. As Taichi predicted, they were all still friends. At the end of the day, Taichi listen as Inaba mischievously tell her one of her secret that was similar to Taichi’s.

On another day, Taichi hide with Inaba and Iori in the bushes as they watch Aoki make another confession to Yui. Inaba brought Taichi and Iori to give them some ideas for their relationship. Taichi was at the StuCS clubroom when school ended, Iori enters while pretending to had switch body with Inaba. Iori ran out of the clubroom crying when the real Inaba enters. Taichi then realizes that he had failed to keep his promise to Iori to always recognize her. After getting punch by Inaba, Taichi chase after Iori after receiving Fujishima’s bike. He finds Iori at the bridge and apologizes to her. Iori was still upset as nobody knows the real her, however Taichi was able win Iori over by arguing that all of her personalities she exhibit were all parts of her real self. Taichi left confesses his love to Iori, just as Iori felt Taichi’s words, Heartseed intervene. Bored with the recent event, he escalates the situation by throwing Iori’s body over a bridge and sending her to the hospital.

When everyone gather at the hospital to check on Iori, Heartseed reappear and announces that Iori’s body will soon die and that they must make a choice between which one of them will disappear along with Iori’s body. Taichi couldn’t bear to handle the pain of Iori dying while he lives, so he tries to volunteer himself as the sacrifice which Inaba was fully against. After deciding that Iori will be to die along with her body, the group uses the power that Heartseed momentarily given them to allow Iori to say her goodbyes. When it was finally Taichi’s turn, Iori was using Inaba’s body. Taichi held back his tears to allow Iori to cry, and as her last request, Taichi gave her their first and possibly last kiss. When Heartseed heard their answer to whose soul will depart along with Iori, he congratulates them on making the appropriate choice. As Heartseed was in full control over everything, Taichi and the rest of the StuCS members learn that Iori will live. Heartseed made his goodbyes and left them. During the whole time of Iori’s absence, the ‘body-swapping’ phenomenon seems to have stop. As the StuCS members welcome back Iori’s return to the clubroom with a party, Taichi fear for his life as Inaba told him that she heard about the kiss that Taichi and Iori done, while she was in her body, so meaning that Taichi have stolen Inaba’s first kiss.