A young schoolgirl named Azusa lives with her parents in Tokyo but they are often away leaving her alone with her salaryman brother. She was once a quiet honor student with a secret fetish for being dominated by older men which led her to masturbate frequently. One day, a neighbor boy named Hiroshi visits her with a photo album and takes advantage of her illness to have sex with her. This event triggers further encounters with his friends Kazuki and Hotaru; a delinquent middle-aged man obsessed with Azusa...