Ayu Shirakawa, who has run away from home. Through her cousin Miyako, Ayu is introduced to the author Yukari Ebiwara (penname Hikari Kairou), and starts a part time job as her caretaker. Yukari often slacks off by playing games and going on trips, but Ayu really enjoys her new everyday life. And as the two live together and grow closer, Ayu starts to have feelings she never had before.