In Episode 4 of "Soshite Watashi wa Sensei ni...", the storyline delves into the complex dynamics between Kanna Kuraishi and her teacher, Ren Kisaragi. Kanna, once a model student, has become increasingly rebellious following her parents' divorce. Concerned about her academic decline, Kisaragi-sensei confronts Kanna, leading to a series of intimate encounters that blur the lines between teacher and student.
The episode explores themes of authority, vulnerability, and the consequences of crossing professional boundaries. The interactions between Kanna and Kisaragi-sensei are depicted with explicit detail, characteristic of the series' mature content.