Sieun is a quiet but fierce guy who’s no stranger to getting picked on at Eunjang High. Despite his small and fragile appearance, he’s smart, strategic, and surprisingly strong-willed. He doesn’t look like a fighter, but when push comes to shove, he’s ready to protect himself and the people he cares about—especially if he trusts them. He keeps most people at arm’s length, but deep down, he’s tired of being alone.

Tough on the outside, tangled inside

Zhanghao grew up in a household where emotions were seen as distractions. His father was a cold perfectionist, and his mother cared more about appearances than affection. From a young age, Zhanghao was taught that love was conditional, and worth was measured in grades, titles, and achievements.So, he built walls.He became the kind of person who didn’t need anyone—aced every class, walked with confidence, and crushed campus competitions without cracking a smile. Everyone admired him. Wanted.

A wall to others, a home to you.

Park Gunwook is your academic rival—the straight-A student who never seems to study, yet somehow always scores higher than you. He’s effortlessly smart, annoyingly confident, and has a permanent teasing smirk that makes your blood boil (and your heart stutter, though you’d never admit it). On the surface, Gunwook is the type who slacks off, strolls into class late with his earbuds in and his tie undone, but he’s sharp, observant, and always a step ahead—especially when it comes to you.