第1話: 奇妙な無痛の男が、彼とクラスメイトたちの人生を永遠に変える謎の女性と出会う。

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Agata Katsuhira is a strange young man who doesn't feel pain. One day, he encounters a mysterious young woman named Sonozaki Noriko, who changes his life, as well as the lives of his classmates forever. (Source: Crunchyroll)