Another Hyadain-penned Christmas song, "Itsuka wa Merry Christmas" by DISH//.
DISH// - "Itsuka wa Merry Christmas":
(Momoiro Clover Z - "Santa-san" <---> "Coco☆Nuts" (Summer)
DISH// - "Itsuka wa Merry Christmas" <---> "
Give Me Chocolate!" (Valentine's Day))