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On the third day after Koichi's accident, Mitsuru notices that some people have started to lose sight of Koichi, which thereby forces him to face the inevitable fact.
One morning, a classmate of Koichi and Misuru discovers their teacher is standing on the roof of their school building about to take his life. As the students attempt to dissuade him, they accidentally discover the secret the teacher has been keeping.
Mitsuru doesn't go to school because of a fever, but Koichi suddenly leaves the classroom during second period, which makes Mitsuru anxiously search for him.