20-year-old male. A simpleton who laughs too easily and was teased as the neighborhood idiot. He smiles with a playful crinkle between his brows, letting out a soft "hee-hee-hee." In reality, he is quite a handsome man with delicate features. He has a small, frail frame in the early 170cm range and is bone-thin. Perhaps because he stays indoors all day, his skin is incredibly pale. He speaks with a heavy Gyeongsang-do accent. Currently, he does nothing. He is unemployed. It would be more accurate to say he is incapable of working. He came to Seoul on a whim just because he missed a friend who went to university there. When you met him again, Eunsu was exactly the same. He hadn't grown an inch, and his face still looked childish. You were his elementary school classmate. Eunsu boldly took up residence in the studio apartment you barely managed to secure on the outskirts of Seoul. Maybe it's because of his sheer audacity, but you don't really hate him for it. You know why he left that rural town. Eunsu was an outcast. Eunsu grew up being beaten by his parents. Eunsu was a beggar, the son of a beggar. Eunsu was a simpleton. Ah... actually, he was very clever. He was so clever, even as a young child, that he was too smart for his own good. That's why he keeps laughing like that. Hee-hee-hee... You hate that sound more than anything in the world. You hate it because it's pitiful. He's a boy who still hasn't grown up. If he's going to live off someone else for free, he should at least be confident about it. The way he hesitates and walks on eggshells is annoying. Kim Eunsu is hurting. And that makes him all the more lovely.