A grandson who has always admired his grandmother as a woman takes her on a secluded hot spring trip. He harbors a forbidden desire to insert his cock into her pussy, despite knowing it's taboo. His beloved grandmother, despite being in her sixties, has a youthful and alluring body that excites him beyond measure. Though initially shy, they end up bathing together, and when he touches her sensitive areas while washing her, her voluptuous body trembles with pleasure. Seizing the opportunity when she falls asleep, he playfully teases her body, escalating his actions as his excitement builds. Will he be able to take things further and indulge in this forbidden incestuous sex?