One winter, Joo Hyeon longs to have a playmate to play with all day. Her dream came true when a girl came from the sky. Her family adopted her and named her Gyeongul. She also has magic powers. But Joo Hyeon didn't mind her powers as long as she has a playmate. She and Gyeongul became sisters and best friends who will always love each other. 

However, everything changes after Joo Hyeon's mother passed away. An arrogant stepmother came into the house and took over. She dislikes Gyeongul a lot and she thinks she is a troublemaker. And it happened after Gyeongul accidentally hurt Clara, Joo Hyeon's stepsister. Gyeongul was force to leave. But when Joo Hyeon heard about Jihoo's plan, she went on a search for her sister. 

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Characters:

Kim Joo Hyeon (OC)

- A girl who comes from a very rich family. But she longs to have a playmate. Her dreams came true when Gyeongul came to earth. She loves her new sister more than anything else. She has a crush on Jihoo at first. But later, during the journey with Kyuhyun, she fell in love with him. 

Kim Gyeongul (OC)

- A girl who came as a snowflake. She has three special abilites. One is to create snow and ice. Second is to predict what is going to happen to the person. Third is to kiss other people in order to speak their languages. Like Joo Hyeon, she loves her sister and will do anything to protect her.

Cho Kyuhyun

- The most popular guy in school. He tends to tease Joo Hyeon a lot, much to her annoyance. But on the inside, he is not a bad person and has a good heart. When he heard that Joo Hyeon is on the search for Gyeongul, he plans to follow her. During the journey, he and Joo Hyeon fell in love. 

Shim Changmin

- Kyuhyun's best friend. He also joins in the journey with Kyuhyun and Joo Hyeon.

Clara Smith (OC)

- Joo Hyeon and Gyeongul's stepsister. She is spoiled and arrogant just like her mother. She has a huge crush on Jihoo. 

Park Jihoo (OC)

- Another richest kid in school. He likes Joo Hyeon. But he has a wicked plan to make Gyeongul become a stuffed model in a museum. 

Jessica and Tiffany

- Clara's friends and alies. They will do and follow Clara wherever she goes.