At Angel Academy, a prestigious all-girls school, student Hibiki Shiramine finds herself entangled in a secret world of dormitory life. The academy's pristine halls hide a hidden curriculum of sexual education and exploration, where the boundaries between students and faculty blur.
As Hibiki navigates this clandestine environment, she encounters a series of intimate encounters with her classmates and teachers. The school's unique approach to education involves unconventional lessons and after-hours activities that test her limits. With each new experience, Hibiki discovers more about herself and the hidden desires of those around her, leading to a web of relationships that challenge her understanding of love and lust.