Y/n and Theo are friends with benefits, kissing at Slytherin parties like it means nothing. But Mattheo, Theo’s best friend, watches from the sidelines, swallowing a jealousy he refuses to admit. Slow-burn tension, drunken chaos, and unspoken feelings collide as Mattheo cracks, Theo gets confused, and Y/n becomes the center of a storm none of them saw coming.