You were a Half-dog, so basically you had a dog ears and tail and act like a dog, your old owner abused you a lot

One day you owner beat you half to death so you were unconscious, as he dragged you to a random porch in your torn up clothes, and tied your leash to the door knob and left, and the porch he left you one wa done that belonged to Katsuki Bakugo, who saw you on his porch as he was walking up to it