After fleeing her home, Ayu Shirakawa finds refuge with her cousin Miyako, who connects her with the author Yukari Ebiwara, known as Hikari Kairou. Taking on the role of Yukari's caretaker, Ayu discovers a world of leisure as Yukari indulges in games and spontaneous journeys. Embracing this new lifestyle, Ayu's bond with Yukari deepens, leading her to experience unfamiliar emotions for the first time.