Ah, the classic "drink juice from a champagne glass to get your underage characters to act drunk" trick. It wouldn't be a complete manga without such classic shenanigans.
Given how aggressive Koguma has been in the last few chapters, I'm guessing she's not drunk at all, and just acting like it to have an excuse to fall back on to claim she wasn't really being so affectionate with Hino.
Poor Hino she wants to confess so badly. These two are practically dating already anyway. I hope this goes the same route as Jyoshikou Dakara when it ends and we get a ton of extras with them actually together after High school and Hino still talking poor kaguma into doing random/freaky stuff haha.
Wait what? Was Hino just about to confess? That was completely unexpected. Shes always so nonchalant that i dont even expect her to be the one confessing.
Tho is rare to see her that frantic... even saying Koguma-san in panic lol.