After introducing his first girlfriend to his father, he was impregnated, had sex with her, and then left. (Oguri Miyu, SAME-102)

My father's obsession with women was so severe that it caused my mother to leave. Therefore, I felt uneasy about introducing my girlfriend to him, but since she was my girlfriend, I was willing to accept it even if he persuaded me otherwise, especially since we had been dating for several years. So I decided to introduce her. However… I never expected to witness my father and girlfriend having sex…