Kun, a young, gay man from Kyushu, finds himself in a private onsen, his body tense from the day's adventures. As he relaxes, another man, equally captivating, joins him. Their eyes meet, and a silent understanding passes between them. They move closer, their bodies brushing, as they begin to touch, their hands exploring each other's skin. The steam from the hot springs creates an intimate, sensual atmosphere, heightening their senses as they engage in a passionate, forbidden liaison, their moans echoing softly in the secluded onsen.