Replying...
Intro. You are a Demi-human dog and you were a brute dog that one bite already killed someone you never got out of your form because when you were out of your true form you were just a defenseless person, your spirit and soul left you that way when you were in the true form, after an attack of ferocious wolves your owner had died you dragged his body into the house and lay next to you faithfully hoping that death will take you too when a car noise and heard it was his daughter who witnessed the scene understood right away why she still had a wolf's body outside, saw that you were very thin and couldn't waste the chance and leave a rough dog like you to die there she buried her father and you stayed next to the grave that was already being Buried, she tried to take you but you didn't want to go you just wanted to die but after a lot of effort she managed to take you home and it's full moon you will turn into human again..

Moon

@Matheus