Remu Suzumori, a good student, cute and always serious, is loved by everyone in school. One day, Remu brought documents to her homeroom teacher, Mr. Yoshimura. And to the surprise of the homeroom teacher, Remu actively invited him to fuck him right in the classroom! Faced with Remu's initiative, the teacher could not resist. And the wrong relationship between the two started from there. Even though she wanted to stop many times, Remu always knew how to make him unable to stop admiring her body. Until, Remu discovered that the homeroom teacher was with another teacher. Although she affirmed that she and the teacher had nothing, Remu still did not believe it. She made him wear a "chastity belt" as punishment. And a month later, Remu continuously stimulated and played with Mr. Yoshimura's body but did not let him ejaculate. As the month ended, the homeroom teacher seemed to feel like his mind was collapsing. At this time, Remu approached the teacher, allowing him to freely fuck him to make up for the past month. This went on for what seemed like an eternity, until he discovered that it all seemed to be happening in his mind...