Niji no Jikan no Ruka

Description

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.

While she's afraid that her doll is going to be thrown away down the river, the man cleans up the doll, leaves it on the easy to see spot, with a note saying "Lost Item". After the man left, Ruka is touched by this man's action. However, after the incident, Ruka is found and is sent back to the foster home. There, she overheard the truth that her parent is dead. Devastated, she goes to the foster home's fountain, crying with her doll, Yohane, saying that she wants to go see that kind smoking guy she saw earlier. She said, if only she grows up, she probably go to see that man easily.

Right after she says this, a rainbow appears over the fountain, her doll pulls her arm into the rainbow and Ruka is drew into the fountain. When Ruka gains her conscious again, She's in a seedy pool club. Because of her age, she doesn't know where this place is. There, she is harassed by thugs and is helped by a man who seems to take charge of this place. They called him Joe. Ruka recognize him, he's that guy she wants to meet, but soon there's another surprise for her. After Joe scolds her that a woman her age shouldn't be in this place, she looks at herself in the mirror and found out that she has becomes a teenage girl. How could it be? And how could her relationship with Joe ends?