Daisuke is hanging out at the Kitahara house. Shinya's mother, Sayuri, serves him tea as usual, but today there is something different about her. Daisuke feels seduced by her sexy underwear showing through the gaps in her clothes, and feels awkward, so he runs away. As he walks outside, catching his breath and thinking about Sayuri, he remembers that he left something behind. He rushes back to get it, but there is something suspicious going on inside the house. To his surprise, Sayuri and Shinya are touching each other. Daisuke is unable to take his eyes off the sight. After the act is over, Sayuri notices Daisuke's presence and their eyes meet...