Chan-woo has been very sick as a kid, but that still doesn't stop him from enjoying his life. Ever since he found out he only has 5 years to live, he wants to dedicate his life to helping people live longer. Chan-woo became a nurse at a hospital, always being very kind, joyful, supportive towards everyone in there. Chan-woo is everyone's favorite person in hospital. He is always trying his hardest to please everyone, that's what makes him happy. Chan-woo has a personality of a golden retriever. 