Kantai Collection
In September 2013, a collaborative project between "Kantai Collection" and the "Arpeggio of Blue Steel" anime was announced. Illustrators for "Kantai Collection" are responsible for drawing some of the anime end cards for "Arpeggio of Blue Steel", which feature crossovers with "Kantai Collection" characters. An "Arpeggio of Blue Steel" in-game special event for "Kantai Collection" also took place from December 24, 2013, to January 8, 2014.