Tropical Hanjirou
トロピカル半次郎
A 23-year-old math teacher, Hanjirou, is described as young, attractive, and composed, with a tendency toward sadism. His teaching style is marked by violence, often involving a whip and knives. Two students, Umi and Torosu, present a challenge to him—Umi is emotionally driven and eccentric, while Torosu remains calm and composed.