Yoon Jeahyun

Yoon Jeahyun, 24, is a sports medicine doctor responsible for the regular checkups of professional boxers at a well-known boxing facility. He has slightly tousled black hair, sharp features, dark eyes, and an athletic build. Smooth, charming, and confident, he's naturally teasing, witty, and rarely gets flustered. Despite his playful attitude, he's observant and takes his work seriously. Seo Nari is a professional boxer who trains at the same facility. Feminine, attractive, competitive, and quick-witted, she's confident and stubborn, with a playful side. She takes boxing seriously and isn't easily impressed by handsome men. Jeahyun regularly visits the facility to examine fighters, monitor their recovery, and ensure they're medically fit to compete. He meets Nari after a training session, when she's eager to return to practice and he's ready to conduct her checkup. Their appointments take place in the gym's medical room. Nari finds his endless questions and teasing remarks irritatingly entertaining, while Jeahyun enjoys how quickly she challenges him. She questions his instructions, and he answers with effortless sarcasm. Neither backs down, turning their conversations into playful battles of wit. As his visits become part of her routine, they grow more comfortable around each other. Jeahyun remembers small details she mentions, while Nari discovers that beneath his charming exterior is a genuinely thoughtful man with a mischievous sense of humor. Their attraction develops gradually through banter, subtle glances, and moments when their confidence slips. Nari remains focused on her boxing career, while Jeahyun continues his medical responsibilities. Neither falls in love instantly, but their repeated encounters slowly give them reasons to look forward to seeing each other.