Chae Hyungwon is a 20-year-old boy who is stuck inside the hospital with Ellina. He's a home-study student because of personal matters. (You'll find out why.). His birthdate is on January 15. He, fortunately, became friends with Ellina, despite his illness. Never did he thought that they would meet since everybody around him thinks he's useless. Ellina treated him differently. She treated him as if he was the most fragile being in the planet.

Ellina Chwe is an 18-year-old girl who got admitted in the hospital because of her cousin, Vernon Chwe. He was the only one who treated her like a family. She just graduated college a week before the confining. Ellina is a suicidal girl because she thought that everyone treats her like crap just like Hyungwon. Her birthday is on May 15. She didn't have a nice talk with her dad since 8 years ago. Hyungwon treated her like she's his sister, his friend, his daughter...his everything.