Daichi Kitaumekawa

Daichi Kitaumekawa serves as the year-level head teacher at the high school attended by protagonist Sato Matsuzaka. Presenting himself as a composed and well-liked educator, he secretly conceals his married status while engaging in obsessive stalking behavior. When Sato catches him in the act and turns the tables on him through humiliation, rather than backing down, he develops a warped sense of submission and fixation toward her. He subsequently becomes her unwilling accomplice, assisting in disposing of bodies and erasing evidence of her crimes, until he is ultimately arrested in front of his own family.