While his wife is back at her parents' house to give birth, his sister-in-law, Mion, comes to help with the housework. Kenji is completely unable to clean, so Mion cleans the room instead. Kenji can't help but look away when she sees her breasts flashing whenever she vacuums, or her unprotected panties flashing when she wipes the floor. Mion, pleased by Kenji's innocent reaction, reaches down to his crotch and says, "I'll not only help you with the housework, I'll take care of you too."