Natsume Usui, a 21-year-old amateur who works weekdays at a Tokyo meal-preparation center, secretly makes her porn debut. She looks plain and serious, but undressing reveals a beautifully balanced body, narrow waist, and F-cup breasts, along with an extremely horny side. Penetration immediately melts her expression and sends her sensitive pussy into repeated orgasms until she leaks. During her first threesome, relentless follow-up thrusts continue even after she cums, forcing climax after climax and revealing just how wildly this diligent cook can lose control.