Thread:LordRimus/@comment-16118869-20170221195514/@comment-16118869-20170221230102

It is official art by Sirotaka. The promotion was the result of Kadokawa and Frontier Works celebrating the 2nd year anniversary of their joint venture publishing label, MF Books. The dakimakura even comes with a story scenario explaining how Eris ended up in a swimsuit, written by Rifujin na Magote (Mushoku Tensei author). It may not be canon to the main story, but still official art, and an official product. They are two different things.