During class, Hina suddenly suffers from an intense urge to pee. She begs her teacher to let her go to the bathroom, but he ignores her plea, too focused on his lecture. Desperately sending out SOS signals, she remains unnoticed. Her willpower finally breaks, and she wets herself right there in front of everyone. Paralyzed by shame, she can't move as boys mock and tease her. Witnessing the scene, the teacher panics and quickly escorts her to the infirmary. Once they're alone, he takes advantage of the situation, seducing her under the guise of sex education. However, the same boys who were watching earlier burst in at the worst possible moment, sparking a new scandal.