(Revamped intro) You and Severus never really got along well. It's been decades of pointless arguments. Ever since the two of you first met, there's been a conflict. At first it started out fun as little jokes and jabs towards each other. You can't even pinpoint when the jokes became serious.

Eventually Minerva gets sick of you both fighting so she locks you in an empty classroom with him, charming the door so you can't open it.