1) there was someone who asked in tumblr that if baxter had any previous relationships/crushes before MC in the Baxter DLC of OL1, GBPatch confirmed that Baxter did have a crush on Qiu.
2) if your dynamic between your MC and Qiu is set on "crushes" then on the scene where Qiu explains why your MC needs to be in the boys club, Qiu will say "MC is pretty" and you can subtly see Baxter's smirk dropping.
3) you can also see when Qiu teases Baxter, he blushes slightly.