Started out with fun, fluffy, weird slice-of-life but the later drama really wasn't that great. I'm in the same camp as a lot of other people feeling like Kotoka pulled a lot of shit towards the end. A lot of the weight was really one-sided and put on Tatsu for some reason, when she barely showed being into him beyond his back much more than he did with her hair. And the final "challenge" of cutting her hair suddenly as a test is like a red flag at half mast.
Obviously she has complete autonomy over her body and things like hair, but lopping it off to use it as a test? Even before that, moving out wordlessly and not contacting him at all was worse. There's little worse in a relationship than someone who feels they need to test their partner constantly. I know its a story so it's a happily ever after thing, but it feels a little hollow. I think the author just wanted to get to the ending and just did sort of whatever. I liked it best as a silly 4koma.