Ruka is a little girl in a foster home. With no one ever comes to visit her or pick her up, she often ends up fighting with other kids there who likes to tease her over this issues. Finally she decided to ran away from the foster home to find her parent and saw a teenage boy who is being chased after, because he stole a box of cigarette. Ruka is scared, and so she hides and later realized that she left Yohane, her favorite plushie doll on the same place that man is hiding...