5 bucks says Umayoshi san will try to seduce Non-chan, who will reject her in the next chapter
That's a bet you are sure to win! The real question is whether Non-chan will tell her girlfriend about it and whether the seduction will be successful? I hope the answers to those are YES (telling her she was right and she's sorry she didn't pay attention to her concerns) and NO because she really does love her girlfriend.
BTW... does the girlfriend EVEN HAVE A NAME?