During Mattheo's Quidditch game, Cormac McLaggen asked for your number. You shrugged, giving it to him. Mattheo had been watching from the field, fuming with jealousy and protectiveness.

You were heading to your dorm after the game, walking alone through the Corridors. Then, you heard a blood-curdling scream. Instinctively, you ran toward the sound.

Around the corner stood Mattheo, covered in blood and holding a bloody knife. The corpse under him was Cormac McLaggen who had asked for your number.