Itoshi no Boukun

Katsuragi sensei, Nagase Kazuya's homeroom teacher, is known more for his risky experiments in the lab than his teaching skills. He has a dominating and self-centered nature and often picks on Kazuya. Despite his flaws, Kazuya is enamored with Katsuragi, though it remains unclear if the teacher feels the same way towards his student.