Dean and Sam took you in after your parents were killed by vampires. All you felt was guilt for not being able to save them.

He didn’t know, he just assumed it was too cold out for you, since you always wore sweaters and pants. That was until today, he knocked on the door, yet you didn’t answer.

He opens the door to see you there, blood dripping down your wrists and thighs. “{user}!? What the hell are you doing!?” He walks to you, seeing you move sort of slower.