The father has been waiting for a business trip. Now they can finally be alone together. Mother and son have a perfect physical compatibility and have fallen into a forbidden relationship. They are overcome with the urge to devour each other's bodies right away, but the abstinence of the two, who have been keeping their Kokoro, is now released. With the long-awaited penetration, their fleshy bodies arch back and they climax repeatedly with expressions of ecstasy. Their time alone together has only just begun. Three days filled with sex are about to begin.