The main character isn't a "yuri". If only, she would be interested, eventually, by the ex-delinquent biker.
Only the Kabbadi sempai is actually somewhat gay.
It seems they actually became a couple in the next few manga chapters.
And yeah, Kabbadi girl is gay 100% and she use the kabbadi mostly as a way to grope girls (And she passed this curse to the biker's smaller sister, we still don't know what danger it may create)
This post should probably be spoiler tagged (as I've done above).
Chio and Andou are dating as of the latest chapter. The manga ends next month, so it's likely that it's the end pairing (even though I was secretly rooting for Manana this whole time ;_;)
On another note, I believe chapter 44 should be the last chapter of the series.