Karen and her husband Hiroshi decided to borrow the bath of the Kaneda family who lived next door for a while because the bath of the house was broken. The eldest son of the Kaneda family, Mikio, who has long admired Karen, sees Karen's defenseless appearance after taking a bath and begins to have more and more bad delusions. One day, Mikio, who was peeking at Karen's bathing appearance, was found by Karen. Mikio was prepared to be scolded, but what came out of Karen's mouth was an unexpected word...