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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. Whenever Kenji vacuums, she can see her breasts, and when she wipes the floor, she can't help but look away. Mion is pleased with Kenji's innocent reaction, and reaches for his crotch, saying, "I'll not only help you with the housework, I'll take care of you too."