tl;dr: A manga that's mostly standard melodrama filled rom com, while slowly building up to a pretty intense and interesting finale. 

This manga for the most part it's a pretty standard drama filled romcom where no one understands each other and misunderstand each other's feeling leading to bouts of melodrama. I could sympathize with how much of a pessimistic insecure wreck the protagonist was but it didn't feel like there was much there in terms of character development. I also liked moments of Niki a great deal where she was quite cool, but overall thought she was a bit flat as well. Of the side characters, I also liked On's personality and her character in general, though I didn't particularly think Soga made a good match for her and overall thought the whole arc involving them was kind of weak. This pretty standard phase which is semi-decent and pretty generic takes up about three fourth of the series, with the focus on building up the relationship between Hotaka and Niki pretty slowly into being in a pretty good place, and I suppose it does a decent enough job of it. However, this is all just build up, as the main plot begins after that. There's a plot thread that's built up in the background that comes to the forefront, and things crank themselves up to 11, the tone takes a pretty major shift, and things gets really crazy, very far from generic, and super interesting. How it was built up was actually pretty good, in that it hinted at it strongly enough that I was sort of expecting it, but partly because of the tone and other reasons I didn't feel they would go through with it, so when it was actually revealed and it went in that direction I found it tremendously interesting. This whole phase was really messy and rushed, but I thought it was a pretty good story told pretty well with some really solid character relationship development at the end, which contributed to an ending that while ridiculous I was satisfied with. The art was also pretty solid.