Based on the erotic game by Lune.<br>
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Bad plan of the Principal of Women's School that made new policy and allowed a male student to attend and attend Ikenue Takumi Women's School. She plans to make Ikenue look strange and unnatural because she's just a male student herself. However, Ikenue wants to take revenge on them all after learning that the Headmaster has a magical item that is a Music Box with magical powers that can make people exposed to hypnosis.<br>
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(Source: Nekopoi and Has Been Translated and Edited)