Seo-jun's popularity in 'True Beauty' isn't just about his looks—though let's be real, those visuals are lethal. What makes him stand out is his layered personality. At first glance, he's the brooding, mysterious guy with a tragic backstory, but as the story unfolds, we see his warmth, loyalty, and the way he quietly supports Jugyeong without expecting anything in return. His character arc from a rebellious idol to someone who embraces vulnerability resonates deeply.
Plus, his chemistry with Jugyeong is electric. Their moments together—whether he's teasing her or confessing his feelings—feel raw and genuine. Unlike Suho, who can be overly perfect, Seo-jun's flaws make him relatable. His struggles with fame, family, and love add depth, making readers root for him even when he messes up. That balance of charm and imperfection is why he steals every scene he's in.