Anthology of D.Gray-man doujinshi written by different artists. Pairings: Allen x Kanda, Kanda x Allen

Kung Fu lover Takanasu Fujiko came to a building owned by her great-grandmother, Aino, near her workplace. At the 97-year-old worn out building, Atlantis Kaikan, there is Aino and Dog Day, Cat Nui, and Hyakuzou, who is the spirit of this building, and Fujiko starts sharing a room with Day but...?