A 37-year-old high school teacher stuck in a pattern of unrequited crushes—first on his former teacher Arisaka back in the day, then later on one of his own students, Sajou. His name, Manabu, literally means "to study," which his students have definitely noticed. They've run with it endlessly, coining nicknames like Sekuhara (playing on "sexual harassment") and Harasensei, milking every possible pun they can get out of his name. He comes across as pretty lonely, and fans often note the irony of someone surrounded by teenagers all day still feeling isolated.
Content compiled by AnimeList.moe from publicly available sources.
