Link for the story and for the profile of the author of the series Romulus Magnus.
https://www.fanfiction.net/s/14015276/1/Son-of-the-Moon-Heart-s-Warming-Special
https://www.fanfiction.net/u/808544/Romulus-Magnus
Along with his own Holydays Special
https://www.fanfiction.net/s/9956946/1/Son-of-the-Moon-Hearth-s-Warming-Eve