Kyoukasho ni Nai!

Oraku works as a high school teacher and has a relationship with a colleague he wishes to marry. A student named Aya develops feelings for him, and her father, a powerful and wealthy individual, arranges for her to live with Oraku, hoping she will find happiness. Aya often behaves in a flirtatious manner, making Oraku's situation increasingly difficult. The father's wealth is tied to organized crime, and he has strict expectations regarding Aya's purity, threatening severe consequences if she is not kept untouched. Oraku must navigate the challenge of maintaining his professional standing, as living with a student could lead to his dismissal. He also faces the risk of Aya being targeted by others at school.