I really liked this chapter. I like the use of the three stages of drunk Aya in a non-comedic manner. Her exaggerated sadness (immediately jumping to "does she not love me anymore") seems realistic for a drunk person. Mistuki needs to stop being an idiot, of course. Avoiding even looking at her for this long because she felt awkward? Seriously.
Yeah, but let's not forget the fourth stage "clingy bug" is yet to come - if in this stage she gets clingy with Shu ,,, well either Mitsuki will either explode & act, or go into complete shut down.
Going on the trajectory so far, I'm going to guess it's shut down and we will get more chapters of the downwards spiral.