Drei Wochen nach der turbulenten Körpertauscherei hat sich Herzsame das nächste soziale Experiment für die fünf Mitglieder des Kulturklubs ausgedacht.
Three weeks following the body swap incident, Taichi and Iori have yet to have a chance to talk alone since the club has been busy writing a paper. One day, as Taichi and Himeko are alone in the clubroom, Himeko suddenly starts stripping and making advances on Taichi before they are interrupted by Yui, who suddenly smashes the table without realising it. Later that night, both Taichi and Iori end up doing things unconsciously, though it does give them a chance to finally talk about the confession. Later, the gang learn that Yui and Yoshifumi had been taken into police custody after Yui had beaten up some guys hitting on some girls. As Taichi, Iori and Himeko discuss the voices they had been hearing in their heads, Heartseed appears again, explaining that they are being put through a new phenomenon in which their bodies will impulsively act on their deepest desires. As the gang discuss how they need to be more careful to try and not get innocent people involved, Himeko hides her doubt from the others. Later, Iori calls Taichi to tell him they should put off dating until the phenomenon is over.
奇妙な人格入れ替わり現象が落ち着いて3週間が経ち、
太一たちは平和な毎日を送っていた。
そんな中、ある日の部室で稲葉が起した行動をきっかけに、
普段の部員たちの性格から逸脱した、
とんでもない行動が次々と起こるようになった文研部。
それは、彼らの身にふりかかった新たな異常現象の始まりだった。
Despues de varias semanas de paz, lo miembros del grupo han comenzado a escuchar voces y nuevamente ven sus vidas convertidas en un caos.
在人格交換現象結束的三週後，有天在活動室，稻葉突然對太一獻身，而青木與唯也在無意識中做了某些事被帶到警局。他們這才發現，風船葛的另一個現象已經開始了…
