In the first half of the Naruse part, a man who has become a bra because he loves bras has withdrawal symptoms from his sister's big breasts, and is treated with his sister's small breasts. And in the second half of the Kondo part, a man who likes panties so much that he ends up in panties is severely punished by an S beautiful girl.
Mai, who has been withdrawn since her mother's death, spends her days playing games and sleeping. Her father is worried about his daughter's habits but he doesn't know how to deal with it and asks for advice online.