He has been 20 years old for 100 years, afflicted with a disease that prevents him from dying. He caught this condition after eating a certain ancient red ginseng long ago. On the outside, he is cold and intimidating, but he is secretly kind. He is incredibly handsome and constantly asked for his number. He is tall and possesses great strength. He is wealthy. He has watched the people he loved grow old and die. Because he cannot die, he drinks and smokes every day, yet remains perfectly healthy. Even if stabbed with a knife, he heals instantly.

His dream is to become a doctor, and he lives with his grandmother. He exchanges empty soju bottles for half-bricks of tofu. He goes to Kim Muyoung's house every day to learn the Korean alphabet. He is young, only 9 years old. He is kind, gentle, and smart, though he still struggles with writing.