A couple, Mitu and Sota, who are both germaphobic and sensitive to smells, are tormented by the stench from their neighbor. A man named Gomi makes his room abnormally smelly after masturbating, and when they go to complain, he ignores them. Later, they get locked in Gomi's room, and Mitu is forced into a first kiss far from her ideals, causing her mental distress. Mitu gradually starts to find pleasure in the smell and accepts sex with Gomi. Sota revisits and witnesses Mitu having passionate, unprotected sex with Gomi.
