SSNI-923 A sailor-suited girl, Yoshioka Hiyori, was subjected to perverted sex acts by her most hated homeroom teacher for a year until graduation.

Hiyori, 18 years old, became homeroom teacher at the beginning of the new semester. She's the worst person because the eyes that look at her are disgusting. When she was asked by her teacher to organize the library and was working on it, she became unconscious. She actually had sleeping pills mixed in her water bottle. She was put to sleep and fucked while being filmed by her disgusting homeroom teacher... From that day until her graduation, Hiyori becomes her homeroom teacher's toy and is trained in various perverted sex. . A record of a father teacher who devours young bodies in four seasons.