Riho is a housewife living in an apartment. "My underwear has been disappearing from the laundry lately..." she wonders, but the culprit turns out to be a young man living alone in the room next door... Seeing him apologise profusely, with a very upset look on his face, the Kokoro-hearted housewife inadvertently arouses her maternal instinct... "I understand, Yusei... but I'm married..." "I can't hold it directly with my hand..." "I can help you by wrapping it in the fabric of your panties, which you like..."