One day after school, Kaede, the student council president, and Hayato, the secretary, are summoned to the student council room by Kaede's twin sister, Suzu. Kaede is curious about a mysterious box on the desk, and when she puts her hand in it, her hands are restrained...

On the day of the cultural festival, Hayato's class decides to have a maid cafe, and the girls dressed in maid uniforms are very active. Of course, his classmate Kaede is no exception, dressed as a maid and serving customers. Then, for some reason, Suzu, who had come to the cafe dressed as a maid, offers him a mysterious switch. Hayato turns on the switch to try it out and Kaede suddenly begins to writhe in agony. It seems that the switch that Hayato pushed is connected to a rotor that is inserted into Kaede...

Hayato and Kaede grow much closer after having sex on the rooftop, and now they openly flirt in front of Suzu. However, over the weekend, Kaede tries to get ahead by showing up at Hayato’s house dressed as a maid. But there, she’s met with a bound Hayato and Suzu, with a blank expression, also dressed as a maid.

The hidden feelings of Suzu, usually a quiet and reserved younger sister, begin to overflow…