I'd rate the first half 7/10, but the 2nd half was kind of a slog to get through at 6/10.
From half to three-quarter mark, the protagonist's "will they-won't they" hit peak frustration and I'm not sure I've felt so annoyed in almost anything I've read so far.
Overall the show hits extremely well with comedy, I always felt like it could make you laugh any time it wanted.
The final part of the story was a good wrap up albeit short. I'm also quite disappointed that no one kissed anyone at all in the entire story, the seinen tag was only applicable to the dirty jokes.
Lastly, I want to add that, personally, I feel that Mayumi has almost no redeeming qualities and I actually felt zero sympathy for her whatsoever in the latter half.