The slightly ditzy Mirei Shinonome, affectionately known as Mire-tan, spends a day alone with a masochistic man in his room. They flirt, laugh, play with each other, and edge him again and again as she lets her playful femdom side run wild. It is her first time leading this kind of production, but his reactions awaken her nurturing side and she grins while giving him sweetly sadistic treatment. Whether cooking, bathing, or out on a date, she never stops her dirty pranks, finally blossoming into a G-cup devil who drains seven loads in one night.