Takeshi and Mio have been dating for two months, each a virgin and the other a virgin for the first time, and they have been nurturing their love. Suddenly, Kubota, a dodgy senior, visits Mio to try to sell him a fraudulent luxury down comforter, and falls in love with her at Mio. The weak Takeshi is unable to resist Kubota, who is well-built and powerful, and the couple only attends the house they are invited to, unaware that it is a plot to steal her away. Takeshi, who cannot drink alcohol, is forced to drink it all in one go, and Kubota attacks Mio in front of Takeshi, who is passed out drunk.