Hooray for random rare pairings! This was quite nice, and I especially liked how Raiko got embarrassed only after kissing Lunasa. I'm glad to (finally) see a Raiko comic, even if it was really short - she never really got much attention. Now I just have to wonder how Lunasa's sisters and the Tsukumo sisters react...
I think that's the first time I've ever seen Raiko in a doujin. For an EX stage boss, she really isn't too popular... but then, that's what happens when you're up against wolfgirls, mermaids, and adorable inch-tall samurai princesses.