Due to her husband's work, Yui is forced into an unexpected solo trip, where she meets An, who is also traveling alone. The two hit it off over shared interests and decide to stay at the same inn. Talking late into the night, their bond grows stronger. While spending time together in the outdoor hot spring, An finds herself drawn to Yui's presence. Though slightly uneasy about An's gaze, Yui secretly begins to feel attracted to her as well. That night, An boldly touches her lips to Yui's. It's a moment unlike anything Yui has ever experienced—intense, overwhelming pleasure. This one-night, two-day journey sparks a new emotion between them.