Aoi is a studious girl dating her classmate Mibu-san, but her life takes a dark turn when a mysterious man enters her home. Claiming to be there at her mother's request, he uses a shady app and hypnosis to convince Aoi that she needs "sexual practice" to be a better partner for her boyfriend. As the man manipulates both Aoi and her mother into erotic encounters, the boundaries of family and trust are shattered by a sinister digital influence.
During Spring Break, Auno is surprised by a visit from his childhood friend, Kojima, who has returned as a provocative gyaru. After she convinces him to lose his virginity to her, the two share an intense physical connection that leads Auno to believe they are starting a real relationship. However, Kojima eventually reveals a cruel twist: she only agreed to date him as a temporary distraction until her actual boyfriend returns.