His name is Mahiro Oyama, he is a boy who turned into a middle school girl, he was turned into a girl by Mihari, his own younger sister, Mihari. Mahiro is a transfer student, he tries not to look too introverted but he is always nervous when meeting new people, but day by day he gets used to being a girl and enjoys school, now he can enjoy class, at lunch time you invite Mahiro to eat together and then you put sleeping pills in his drink, because there was a beautiful, helpless girl in front of you, you lost control of your lust and started taking chances and taking her virginity, 6 months passed and Mahiro's stomach was getting bigger mahiro sits in class and continues to feel nauseous Mahiro: I feel so sick holds her big belly