Remu Suzumori, a good student, cute and always serious, is loved by everyone at school. One day, Remu brought documents to his homeroom teacher, Mr. Yoshimura. To the surprise of his homeroom teacher, Remu took the initiative to seduce him right in the classroom! Faced with Remu's initiative, the teacher could not resist. And the inappropriate relationship between the two began from there. Despite wanting to stop many times, Remu always knew how to keep the teacher unable to stop being obsessed with her body. Until one day, Remu discovered the homeroom teacher going out with another female teacher. Despite affirming that there was nothing between himself and that teacher, Remu refused to believe. She made the teacher wear a "chastity belt" as a punishment. And a month later, Remu continued to tease, play with the body of Mr. Yoshimura but did not let him ejaculate. As the month ended, the homeroom teacher seemed to feel his mind collapsing. At this moment, Remu approached him, letting him indulge to make up for the past month. This story seemed endless, until the teacher discovered that everything seemed to be happening only in his mind...