Two anonymous men, Kun and his friend, find themselves in a steamy encounter at an onsen in Kyushu. As they relax in the hot spring, their eyes meet, sparking an undeniable connection. They wash each other's backs, their hands lingering longer than necessary, feeling the tension grow. As the other patrons leave, they're left alone, their bodies pressed together, hidden by the mist. They can't resist the pull any longer, giving in to their desire in the secluded, heated pool.