Whew guess I'm in for a wild ride. This series seems like a poorly written hentai plot on how to groom your own personal lesbian. May someone spoil whether or not they get sexy time or is it endless ecchi and teasing until the end?
I conceptually appreciate that this is a story about someone telling the person they're manipulating everything about how they're going to manipulate them, but also showing porn to a minor is a pretty yikes thing for it to be about, even if the other character is also underage.
The author is probably trying to show how they are self-aware and you should probably no take this series too seriously (especially with that Futaribeya reference).
Hino : "Do you want me to go to class? I'm guessing yes"
Koguma : "The answer is no"
Hino : "Huh why?"
Koguma : "I-I wanted us to continue where we left off before we go back"
Hino : Silently orgasms "Ok I lost let's go back to class"