Cast :

Park Chan yeol

The rapper of popular korean idol group, EXO. He's known as talented idol with gentle personality. He meets with Chaeyoung and later receives letter from her.

Park Chae young

A 20 years old girl, currently studies at Ehwa Woman University. She never liked exo before, until she met Chanyeol in person and fell in love at the first sight. Unfortunately, then she diagnosed with brain cancer which change her life.

Jeon Jung kook

Chaeyoung's bestfriend. They lived at the same house along with Lisa, their other friend. Jungkook actually liked Chaeyoung but he don't know how to show his true feeling