This chapter is peak. Also is this the first time I've seen Mizudako so cheerful and smiley? Normally she has a pretty blank face or is nervous, but she was actually laughing quite freely.
Every now and again the density of an MC gets me to chuckle. He flat out denies mizudako a sense of fulfillment of him possibly being wishy washy about her being his girlfriend. He then witness her "Sus" flirtations and so she'll shocked he causes her to pout.