I NEED HELP FINDING THIS BL TITLE

This BL is full colored. As I remember the bottom was a knight(?) and the top was some kind of supernatural something. The top could turn into a wolf, has blue eyes and long white (?) hair. The top is always sweet and sometimes naive.

The top ended up getting reborn again because of a punishment of having connection with a human and then over time the top kept trying to remember the human by visiting him at night.

PLEASE PLEASE HELP ME, IT'S DRIVING ME NUTS. my memory about this is hazy