第5話: ミューメルの死後、ミチルは死の淵に立たされ、自身の分裂した人格とトラウマに満ちた過去を明かす日記を発見する。

Michiru is devastated by Meowmel's death and has taken a number of pills. Yuuji takes her to the infirmary where she recovers. Sachi gives him a locked box which she received from Michiru. He opens it and finds an exchange diary that Michiru kept with her other self. When Yuuji confronts her with it, he learns that Michiru developed the other personality after receiving a heart transplant and that her original personality has hidden itself away and does not want to return. Yuuji forces Michiru's original personality out, and she says that she wants to die. Yuuji agrees to help her and he takes her to the bluff overlooking the ocean where she played with Meowmel and buries her alive in a coffin. Trapped in the darkness, Michiru starts to hallucinate and we see her past in a flashback. In middle school, Michiru became depressed because she was always being told she was a failure and intended to kill herself. On the roof of the school, she met another suicidal girl, and the two became close friends; however, the girl later killed herself in front of Michiru, which caused Michiru's weak heart to give way and led to her heart transplant. Michiru later discovered that the heart she received was from her friend, with whom she was able communicate. Back in the coffin, Michiru comes to the realization that she does not want to die anymore and she pushes her way out of the coffin. Yuuji, who has waited three days for her to emerge, helps Michiru to the surface and he carries her back to the dorm. Yuuji later takes the alternate Michiru to see her parents, and, although she appears less often, she still resides in Michiru. (Source: Wikipedia)

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