Thanks for the scanlations :D
That was peak, as usual.
I love the detail of Hikoichi deciding to ask Nayu out for tea, because he knows about tea and sweets. He brewed tea to go along with her gift cookies in Chapter 23, for instance.
Also, Uni student's love life seems to have been incredibly awful, which is probably why he is as socially aware as he is. How many exes does this guy have?
(From Chapter 23)
(From Chapter 29 – this chapter)
I'm pretty sure there are more examples, but I can't be bothered to look right now.