A 9 Year Old Girl, Choi Jinri lives in Seoul with her Step-Mother. Since her birth, she kept a wishing coin, there's a note that says: "Jinri-ya, you must wish a wish in front of a water when you're old." Thats why now Jinri is doing that. But she dropped the coin, and a boy caught the coin. Even though Jinri has screamed to give the coin back, that boy is too far and cant hear it.

When Jinri went home, she got scolded because of her lost coin. The next day, Jinri found lots of money. But Daehyun (Myungsoo's brother) appeared and stole it away from Jinri. When she went home, Jinri got kicked out of the house because of losing that money. Jinri cried and want to make her way to her house. But then her Step-Mom went outside, pulled Jinri and cut her hair until she's bald. Jinri then wrapped her head with her clothes like a veil. 

Jinri has no house to live in. She started wandering around, and met the boy that caught her coin, Daehyun, but she didnt realize it. Jinri stopped in front of a box house. Lots of kids live inside it. Its their house. The house is ruled by a 4 year old named Hayoung and her brother Sehun who is also a 9 year old. Instead of letting Jinri in, Hayoung ripped the clothes on Jinri's head. And everyone laughed at her except the one that caught her coin. 

The moon replaced the sun. Its raining. Jinri is sitting on the bench in front of the box house. The boy walked towards Jinri and offered to live with him and the other kids. 

With those kids, Jinri have lots of friends. Including Hayoung and Sehun that has apologized to Jinri for being so annoying and rude. Jinriand Myungsoopromised to be forever a family. And Jinri is Myungsoo's first priority. But Daehyun is jealous since Myungsoo got his attention on Jinri and didnt think about him anymore.

When things get hard, Myungsoo will always be beside Jinri. Daehyun, a little bit pressured but him too. But someday, things wont be always right. 

Thats when they need to seperate.