Mary lives with her stepson after her husband's passing, and she has faint romantic feelings for him as he resembles her late husband. A trip to a hot spring resort just the two of them... legally parent and child, but strangers in reality. Knowing it's wrong doesn't stop them... an illicit bond ties them together. Unable to resist the thrill of taboo, they make love in the night of Jōshū... can't hold back any longer. The moans of a parent and child echo endlessly through the night.
