What a tease, there at the end. I know Tarou is going to keep stringing us along and, seeing as how the development's been written so far, I'm sure whatever kiss/confession/etc. won't happen after a ton of build up and instead it'll happen when we least expect it. Every other big build up has been a tease at the end.
In any case, Omi-chan has to fuck off now and let these two ravish each other.
Also, I think it goes to show that it really is Hino who doesn't understand their relationship; Koguma certainly does, or at least she has much more of an idea about what the stuff they do together means, while HIno was still, up until now, seeing it as something to do just for a reaction. Hino-san really is a baka.