Manabu Hara  

Harasen, 原 学

A 37-year-old high school teacher named Manabu, who has experienced unrequited love from multiple individuals including his former teacher Arisaka and a student named Sajou. His name translates to "study," which makes it easy for students to create puns such as calling him "Sekuhara" (sexual harassment) or "Harasensei" (harassing sensei).