At a slumber party where everyone was supposed to do their homework, the naive girls happened to find a shocking lewd photo of their older brother's erotic book, and they couldn't control the urge in their lower bodies! 3

Naive students hold a sleepover at a friend's house to do homework! However, instead of neglecting their homework, they all end up reading their older brother's erotic books, and their minds are on the verge of panic from the lewd content of the erotic books! "Are you really going to do this when you grow up?" The troubled naive girls consult their older brother and ask him to solve the mystery of the sex.