TEN

English teacher Kijima-sensei and his six years younger colleague , PE teacher Ono-sensei are working in an all-girls school on a hill. After Kijima overhears a girl confessing to the PE teacher, Ono asks him for advice. The two get closer bit by bit and in a conversation Ono confesses that he has a one-sided love. Who is the person Ono has one-sided feelings for and how will Kijima handle the matter...

Despite his constant anemia, an accident leaves Akagawa Touma infested with an alien blood parasite, and the unintentional protector of Earth.

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