I made a doujinshi with them. Well, actually it's not KoyaShige only... but since they're there and Shige is one of the main characters I thought I could share it here!
Here you are:
Just click on the images to fullview... and have a little fun!
I don't know if it can be counted as an entry for the Marching-K contest so I won't tag it. Mods, if it can be counted, please let me know! ^^