Here is a mixed series illustration book from Yun Kouga herself that I got from Suruga-ya! There isn't much to this doujin, just a couple of illustrations by the great manga-ka. It is pretty short at just 10 pages. There is a picture of Ritsuka and Souma from Loveless but I don't recognize the characters from the other pictures. The art is amazing as always from Yun Kouga. Hope everyone enjoys!
https://www.mediafire.com/file/nex568vr9ysp0j5/%2528Kokonoe%2529_%25E5%2588%25B6%25E5%25BE%25A1%25E4%25B8%258D%25E8%2583%25BD.zip/file