Re-reading chapter 2 and 3, you can definitely Hino see react to the Mizo's full page imaginary-senpai thoughts. You can also see his dialogue react to Mizo's worries. Hino's stunned expression from that Mizo's complete disbelief was really cute.
I like how Takahashi-sensei's work seems grounded in queerness without sacrificing the tone of her work. Like in this one, the reference to the legality of same-sex marriage. In some other bl or yuri works, they're glossed over in favour of mood and atmosphere or the topics override them if they...
So the gift he wants Narita to accept is a tattoo-removal? Interested to see if Mangaka guy will reunite with "M-san". Sorry I can't remember your names.