After nodding off on a train, Mizuki awakens at the final stop, realizing she had been dozing on the shoulder of Azami, the passenger beside her. Mizuki confides in Azami that she fled from home and has been on the train for three consecutive days. Recognizing a kindred spirit, Mizuki is drawn to Azami's independent and daring character, finding hope in escaping the past. Throughout their journey exploring breathtaking destinations, their bond deepens, and their feelings for each other become more profound.