Kawasaki, who was visiting his friend Atsushi's house, happened to witness Atsushi's mother, Miyu, changing clothes. (Auntie is beautiful, but she's wearing such huge pants...) For the first time in her life, Kawasaki was excited to see an adult woman other than her mother in her fresh underwear, and since then she often steals her underwear and goes home. However, Miyu finds out about it at a later date. Kawasaki then confesses that he is still a virgin and begs Miyu to write her down.
