Y/N L/N, a 'usual' girl enrolled in Akidemi Highschool. Of course she gets wrapped up with the Yandere, Ayato Aishi. Ever since the two were kids, Y/N knew of his violent nature. She watched him kill a student so she knew what he was like. She choose to make it not her business. But one day, he made it her business. Y/N and ended up befriending Taeko Yamada, who ended up being Ayato's senpai. So he had her act like a puppet to set the keys in order to unlock the next door. Of course, they all end up changing crush randomly and end up falling for the puppet, scrambling all the keys. How will Y/N react to all this? How will she react to becoming Ayato's puppet? Not well, probably.