Okay I still like this story and all, I just wished there was some actual progress with these two. I thought that's what we were going to get in this chapter. I'm not saying they should've kissed or have a confession scene, just have something happen to make Seto more assertive or make Anjou tease Seto less.
I thought they were going to have that moment with Anjou talking to Seto as to why he doesn't like the idea of other men in her room, instead we get a gag where Seto sticks his thumb in Anjou's mouth (kinky?) and he runs off in embarrassment, where the topic of will be put on hold (if it ever gets brought up again) and the God's of Status-Quo remain pleased.
I know some readers of this manga won't like me using this as a reference, but in Ijiranaide, Nagatoro-san, we had Senpai getting more and more comfortable around Nagatoro; having him replace his mary-sue love interest from his manga with a neko-version of Nagator in chapter 13 and also have him be more aware of some of her tricks. Nagatoro meanwhile has gotten more gentle in her teasing, she helps Senpai with getting him more active, and she even started to stand up to her friends when they started to tease Senpai.
This manga shouldn't have to copy Ijiranaide, Nagatoro-san, although it does have some of the same beats (female MC giving the male MC a haircut, female using a water bottle to tease male over indirect kiss, female inviting male over to her house in chapter 17/18), I'm just saying the characters need to show some change in their dynamic to show how their relationship with each other has affected the two of them.
At this point I feel like the manga is just going to keep using the same tease the love interest relentlessly formula until either the final arc of the manga that makes them an official couple, or it just ends with nothing to show for itself.