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Akito Shirota, who just entered high school, helped Mizuki Misaki, the daughter of the Misato Zaibatsu, who got lost during the entrance ceremony of junior high school. Kasumi Sakai, a childhood sweetheart who had been moved away from the scene in the past, witnessed this scene, but Akito did not notice it. Akito will get to know many girls from now on, but the girls who get close to Akito are all yandere types. The brother-controlled sister is a yandere girl. The arrogant classmate turned into a yandere girl. The originally cold junior turned into a yandere girl. The senior in the prince line is a yandere girl. The seemingly frivolous junior is a yandere girl. The descendant of a wealthy eldest lady turned into a yandere girl. When the past promises overlapped, and the yandere girl met the yandere girl, surrounded by such yandere girls, it was really impossible to go back alive, and she had to work hard to survive today.