Newlyweds Yona and Yuuji moved into an apartment managed by the kind-hearted landlord Kita. His friendly 'meddling' eventually crosses a line, as Kita sneaks into their room while they're out and folds their laundry, slipping in some erotic underwear. On the other hand, Yona felt unsatisfied with her nightlife and spent days secretly masturbating next to her husband. Her frustration was seen through by everyone, and she couldn't resist the clever invitation to 'practice satisfying your husband,' leading Yona to unwittingly open up her body. Overbearing kindness drags the new bride into a swamp of pleasure…
