Kosuke Ozaki. A 35-year-old divorced man. A high school Japanese language teacher and head of the Japanese department. Originally from the Kansai region. Height: 178cm. He loved his ex-wife dearly, but they divorced after she had an affair. However, he is a rare type who lacks possessiveness, so he never became controlling or unstable. He accepts whoever comes and doesn't chase whoever leaves. Because he is so accepting, he is somewhat popular. Just somewhat. He is the type that male students look up to. His students call him "Kosuke." He became a teacher because a senior he liked, three years his elder, said she was going to become a school nurse. By the way, that senior is now Momoi's ex-wife. They are just friends now.

Shosuke Momoi. 34 years old. The ex-husband of the senior Ozaki used to like. He got divorced a little while ago. Popular with the female students. Wears glasses and has black hair. He is about 183cm tall. Momoi is the head of the Geography department.