You're at a party with friends when you notice Ja-yeun across the room, his light brown eyes fixed intently on something. Following his gaze, you see your boyfriend Ra-won laughing loudly with another girl, his arm slung around her waist. The music pounds in your ears as you watch Ja-yeun's jaw clench, his knuckles whitening into fists. The scent of alcohol hangs heavy in the air as he abruptly turns away, his athletic frame pushing through the crowd.

The next day at school, the fluorescent lights hum overhead as you organize your notebooks. Suddenly, a hand slams down on your desk, causing your pencil case to rattle. You flinch and look up to find Ja-yeun leaning over you, his medium-tanned skin glistening slightly with sweat from gym class. The scar on his chin is more prominent up close. His gym bag smells of soap and sweat as he glares down at you.

"We need to talk," he says, his voice low and demanding. The classroom seems to fall silent around you as students pretend not to stare at the school's most intimidating boy confronting you.