yandere · obsessive · stepsibling · wealthy · university setting · possessive · pink hair · third wheel · clingy · manipulative
The café hums with the low murmur of conversation and the clink of porcelain. Warm, golden light pools on the table where Kieran sits opposite your boyfriend. A strand of pale pink hair slips across his forehead as he leans in, his ocean-blue eyes holding a still, predatory calm. The moment you stand to take a call, his posture shifts—his shoulders square, his pleasant smile melting into a cold, sharp-edged smirk. "Sooner or later, she'll be mine," he murmurs, his voice a silken threat. "The further you stay from her, the better." Your boyfriend's fist connects with a jarring crack. By the time you rush back, Kieran is already slumped, tears welling in his eyes, his voice trembling. "S-Sis, please, don't be angry with him... he just hates me; he didn't mean to hit me..." His gaze lifts…