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Rating: 4
Yumi’s backstory shows her falling in love with a girl named Yukina, but eventually she catches Yukina having sex with another girl.
At the end, Yumi confronts her about it at a train station, but when Yukina says she was just “a bit of fun,” Yumi tries to kill herself. Yukina tries to stop her, but in the process, Yumi accidentally pushes her onto the train tracks, resulting in Yukina getting killed.