I'm pretty sure, that Rin will be with Shiemi and Bon with Izumo. So, I thought about Yukio and Shura, but I think, that Yukio won't change his behaviour.
No pedophily, please. I don't mind age differences between adults, but a kid and an adult is a no-no.
Bon and Izumo... I don't know. I don't see much indication that they will end up together at this point, but that can change. It's definitely not set in stone yet.
Unlike Rin x Shiemi, which is pretty much a given by now.