Adult music student Rei Kuroshima normally masturbates twice a day, but she is ordered to abstain from sex and masturbation for a full month. After 30 days, her body has become so sensitive that the slightest touch nearly breaks her. The moment a penis enters her, she gushes, convulses and cycles through intense highs and trembling lows, reaching unfamiliar orgasms until she collapses in a daze. Pushed beyond her limits, she even begins hearing things as the shoot shows her what truly overwhelming sex feels like.