I mean, I guess you could see some potential for chemistry between Kyo and Moe, but, well... Moe's reaction there at the end feels like it wouldn't have gone well (literally called him scum for the guilt-trip move). Anna just works better since she seems willing to accept all aspects of him.
I guess if he kept quiet about how he really convinced Hosaka to apologize, there might have been potential, but either it would have come to light at some point, or he'd make another move that'd bother her and push her away eventually, anyway.
There's really only one girl for Kyo, ultimately.