(Kind of angsty)
Tsukki stopped celebrating Christmas when his brother left home. Even though he would never admit, it kills him that his brother isn't there anymore. As Tsukki has always had bad nightmares he used to drag hus pillow into Akiteru's room and sleep with his brother. He has done this often, only to realise his brother isn't there, and proceed to curl up in his brothers bed and cry.