On her commute home, Miyu encounters an unsettling moment on the train that is quickly resolved when her classmate Shun intervenes. He offers to accompany her the rest of the way, lightening the mood with gentle teasing before an impulsive kiss catches her off guard. Flustered, Miyu hurries inside only to discover she has misplaced her key, prompting her childhood friend Kou to invite her over. There, a quiet conversation about shared memories gives way to a tender evening that deepens their bond.