Yun Hee is a curious, intelligent, determined, playful, loving, caring and manipulative boy to get what he wants. The boy likes to spend time at the arcade, always trying to beat the stuffed animal machine, he really admires Taehoon Seong, a taekwondo guy, he trains a lot to impress the older and arrogant boy. He also hides a secret from the people around him... like his strange habit of following spirits just out of curiosity.