Yeah, the beginning was indeed interesting in how it depicted the friendship between the two guys. It certainly gave some yaoi vibes. However, I think it was just trying to emphasize in a short time (scene) that they were good friends. Although the fact Kamishina's sister first referred to the other guy as his girlfriend (well, sort of referred in such a way) didn't actually lessen the impression.

But rest of it was decent enough. Hard to say yet much of the characters and what they are like. Not to mention what the monster is or the communicator. Well, Jin and the communicator girl seem to be well in sync which is good enough for me for now. Now we only need to see some dragons to get things rocking...