This Bug Won't Leave Me Alone! - Vol. 1 Ch. 28 - Me and the bug went drinking

[telefonevoador]

Do not underestimate the power of the male mind to invent ways in which "she couldn't possibly be actually serious about that, she's just saying it to be nice"

 

[Tairo]

And of course they haven't done the deed, despite all the earlier chapters hinting that they banged on the regular.

What hints? She literally said they were just friends before and suggested they start dating, and he said "maybe".
Most people don't immediately have sex at the start of a relationship...