Wow, this was unexpectedly enjoyable. I liked the exchanges between the two of them, especially Narito's deadpan comebacks.
@yellanha That's definitely what I was expecting coming into this, but the protagonist is actually somewhat interesting in my opinion. He actually seems like he has some semblance of a personality and isn't really a total loser like what you're referring to, just someone who genuinely prefers being on his own.
Takatsuki being interested in him also isn't that bad. It's not too exagerrated like in some stories. It's not like she's immediately fallen for him just because he didn't show interest. Right now, she's only around him just because of this "game" she plays with whoever is her seatmate for some reason.