The only thing I found a little odd was Mai's mom. She comes in so late and so briefly that it feels jarring and out of place. The whole thing with her could've been it's own proper arc, and i feel like it should've been. How it is here just feels a little rushed and almost shoehorned.
I read this comment before I finished binging this, and as I got closer to that plot, I felt it wasn't rushed at all. It fit in, since her blackmail would explain one of the major plot points of the story (why she couldn't get a job). Maybe a TAD rushed but fine?
Then it was resolved in like 6 pages with no retribution coming to the mom. Hell, she got out of it happier than before. That was annoying, I'm with Hana on that.
This story over all was extremely good though. Very entertaining, AND educational!! I learned so much about bugs! Also very emotional, the first half with grandpa slowly dying was very powerful to me. Coulda had a bit more romance maybe, and at points the gratuitous fan-service was distracting (that early bath scene with the three of them, and one just kept doing poses for no reason, good lord what)
But over all, absolutely adored it =w=