A middle-aged man and woman drowning affair that begins in the bathroom - a wet, secret room

Tsubaki lives with her husband Takayuki, who works in sales. My nervous and selfish husband makes me feel uneasy at home. Of all this, the only thing I could feel at ease was when my husband took a leisurely bath while he was working... One day, Takayuki recommends Kanda, a subordinate who accidentally tainted his suit while he was on the outside, to use the bath at his nearby home. Even so, while Tsubaki was taking a bath, Kanda was masturbating to fill her loneliness in her husband's absence...