Your ending is so very...typical of JE fic. XD And therefore awesome.
I have a not-very-secret (I think) love for Kusano ninjaing in on KoyaShige fic, so this makes me very happy. And also Shige being flaily and Koyama being dumb and both of them laughing a lot is always fun. (And I am failing at coherence, but yes, I liked this.)