A young woman in a sailor uniform and an older woman are in a Japanese-style room. The young woman has a solemn expression, while the middle-aged woman looks composed. "Do you understand what I'm trying to say, Nakajima?" the teacher asks. "Teacher, that's so dirty," Nakajima replies. "You don't have to be so scared," the teacher says, quickly extending her tongue and greedily devouring Nakajima's mouth. Pulling away, she says, "Nakajima, you understand the conditions, right?" Nakajima, with a resigned expression, welcomes her tongue again. Viewers will be drawn into the tense atmosphere of their relationship unfolding in this air. (From Episode 1)