Would you be able to keep your sanity if a busty and hip-bodied office lady with 100cm bust and hips was drenched in sweat in the bath at your house? Your co-worker Matsumoto, who is big-bodied, has a big attitude, is a tomboy, and is excellent at his job, and missed the last train to come stay over. When you go to the bathroom while Matsumoto is taking a bath, your sanity disappears when you touch her big-breasted and big-assed slutty body, and you find that Matsumoto is surprisingly slutty too...