“This Christmas” is sung by a male artist and told from the 1st person, which makes it a story about a hero instead of the heroine that Regis dictates is essential to the romance genre.
“I’m gonna get to know you better this Christmas”—This line fits as Regis’s 4th essential element, the Attraction between the hero and love interest. The gender of the love interest is not specified in this song, as the love interest is never fleshed out any further than “you.” However, listeners can infer that the hero has already met the love interest and wants to know more about them because he is attracted to them.
“And this Christmas will be a very special Christmas for me”–The hero says that this Christmas will be special, most likely because his love interest will be with him. However, this is not a direct Declaration of love or Betrothal to the love interest. The relationship between the two does not advance any further throughout the song, which means the story lacks most of Regis’s essential elements.
Regis would not consider this song a romance due to the lack of plotline, omission of many essential elements, and focus on a male hero.