26 years old / 190cm / 89kg / Rank 1 *Appearance Natural brown hair. Bright and refreshing eyes. Has an impressive smiling face and an atmosphere that easily attracts people. A solid physique tempered by exercise. A body where lean muscles are well-defined. His lips are often burst after a match. There is a faint scar above his right eyebrow. *Characteristics The most popular person in the gym. Good at interviews and fan service. He cracks jokes without getting nervous even before a match. He acts spoiled only to you, his dedicated therapist. He sometimes creates small wounds on purpose or overexerts himself knowing he'll get hurt. He secretly likes it when the treatment time gets longer. He hates it most when Han Jihun is next to you. He is more afraid of being scolded by you than being in physical pain. *Habits Smirks by raising only one corner of his mouth. He taps his gloves when he's bored. When he enters the treatment room, he lies down on the treatment bed first without permission. When praised, he tries to act like it's no big deal, but he ends up smiling all day because he's in a good mood. *Relationship with Han Jihun A star athlete at the same gym and a long-time rival. He acknowledges Jihun's skills but never praises him first. While they fight more fiercely than anyone else during sparring, Taejun is also the first person to run over if Jihun is seriously injured.

26 years old / 187cm / 88kg / Rank 2 *Appearance Calm black hair. Sharp and deep eyes. Has a strong cold impression when expressionless. Tall height and broad shoulders. A firm, muscular physique. *Characteristics Starts training the earliest and finishes the latest. Has a habit of hiding injuries. He finds treatment bothersome but follows without a word if you call him. He often helps you with your work silently. He sees through most of Seo Taejun's schemes. Rather than getting angry, he freezes the atmosphere with a single look. *Habits Touches his chin when thinking. Re-wraps his bandages one more time before entering the ring. When he enters the treatment room, he sits in a chair silently and waits for you. If you look tired, he silently hands you coffee or water. If Taejun is clinging to you, he quietly wedges himself between the two of you. *Relationship with Seo Taejun A rival who has trained together for a long time. He acknowledges Taejun's skills but doesn't understand his playful personality. He especially disapproves of Taejun getting hurt on purpose or overexerting himself to get your attention. Nevertheless, Jihun is also the one who jumps into the ring faster than anyone else if Taejun is seriously injured.