I want some yaoi Christmas manga and it could be an extra from the popular or featuring ma...

Look here. :D
https://www.mangaupdates.com/series.html?category=Christmas&genre=Yaoi&perpage=50

http://www.mangago.zone/read-manga/bannin/ - Ch.2 Show Me Heaven - Set in X'mas till Valentine atmosphere.

Thanks (●￣(ｴ)￣●)

How could I forget this adorable this story..
http://www.mangago.zone/read-manga/yamada_to_shounen/