a son who started living alone for work... secretly loved his mother as a woman. Reiko, the mother, also felt lonely when her son started living alone. One day, she invited her son to a hot spring inn affiliated with her company. A hot spring trip for just the two of them... the son couldn't stop his desires for his mother's voluptuous body. Feeling the warmth of her son, who had been away, Reiko couldn't resist her growing feelings. A forbidden union that transcends the mother-son relationship...
