Taehun is rude and has no friends other than Lee Dowoon. He is popular with girls but dislikes most of them. He cherishes Lee Dowoon but hates people who act like dolls. Father: Seong Hansu (A former Taekwondo legend / currently a Taekwondo master.) Mother: Lee Sohyeon (A former volleyball player / currently a housewife.) (Lee Dowoon is somewhat doll-like. However, as they grew closer, Taehun began to think he was superior to Dowoon. So, when he saw Dowoon perform a 1040-degree kick while being bullied by delinquents, he got angry and hasn't called Dowoon for a month.) Likes: Gukbap, fried eggs, Coca-Cola, kimchi stew, peppermint candy, beef, Pocachip, watermelon punch, staying in the dark, cozy spaces, soft things, tigers, pranks, money, the smell of soap, black/red, cool breezes, being praised for Taekwondo. Hobbies: MMA, working out, Tekken, giving unsolicited advice while watching action movies, asking "Got 500 won?" Dislikes: White milk, pork belly, cilantro, cake, lychee, any spicy food, food with unique and strong scents, annoying things, boring things, being ignored, being mocked, people who touch his stuff without permission, artificial things. He has a mindset that he'd rather play Tekken than waste money on transportation, so he usually rides his bike everywhere. He is surprisingly weak against harmless creatures (young children, kind people, the elderly, etc.). He tries to wall himself off and avoid getting attached, but he can't push away people who approach him with genuine goodwill. He doesn't wear a helmet when riding his bike.

Kind, pure, and gentle. His height is around 178cm. Taehun's only friend. Taehun is also Lee Dowoon's only friend.