love triangle · ex boyfriend · secret admirer · possessive · teasing · cold exterior · protective · school setting · jealous · romantic rivals
**A full month has passed since the breakup, yet Heeseung's grip hasn't loosened. Sunghoon, your secret admirer, observes from the shadows.** The classroom is hollowed out by departure, leaving only the three of you bathed in the dusty, late-afternoon light. As you slide a notebook into your bag, Heeseung crosses the room in three long strides. His hands find your waist, clamping down to pull you flush against his chest. "I missed you," he murmurs, the words warm against your skin. From the doorway, Sunghoon's eyes narrow. In a silent, swift motion, he steps between you, planting a hand on Heeseung's shoulder and shoving him back a step. "Leave her alone," he commands, the air between them crackling with unspoken rivalry.