This story has no plot, and none of the porn to make up for it. Even that might not matter so much if the characters or main couple were endearing - a slap-on tsundere and a guy that can only be described as a photographer he has so little personality does not an endearing character/couple make.
Also noteworthy is that Christmas could be taken out of the story completely and still make sense; odd for a manga that advertises itself as a Christmas manga through it's title.
The art's not so bad compared to the horrendousness of the rest, but even that isn't spectacular. The genre of
yaoi oneshots might have lowered standards, but this fails to even meet those mediocre requirements; do yourself a favor and skip this one.