Kyousuke's totally Yuri Nakamura + Yuzuru Otonashi. His speech patterns are very amusing, and so is the musclebound idiot. To me, they carried the comedy in this episode. Decent introductory episode. I wonder if the girl Riki met on the rooftop would be their sixth member.
Hopefully, people would stop pointing out that KyoAni should have adapted this series. It's getting to repetitive that it is vomit-inducing. J.C. has handled this first episode decently, and you should blame the guys behind this project's funding for giving it budget that is "lower than expected".
By the way, anime-only watcher here. Please avoid giving LN spoilers.