The entire story revolves around Amano and Ma-kun getting into situations where Amano will flash her boobs/butt and Ma-kun will suffer yet another nosebleed. The romance plot between Amano and Ma-kun is a main focal point of this manga (aside from the ecchi, that is). It does not get as much attention as the ecchi scenes but it's wholesome regardless. I think this manga would have been better if more focus were put on the romance plot in the earlier chapters.
The size of the cast in this manga is fairly small, the majority of the focus is on Ma-kun and Amano.
There are several issues with this manga that lower its score in my opinion.
(possible spoilers)
Firstly, the pacing is horribly slow. Often you will go multiple chapters without seeing any sort of actual development. More often than not, a chapter is just a self contained mini-escapade, such as Amano and Ma-kun going to the beach or going to the library. It's clear that the romance plot doesn't take as much priority as the fanservice, which in my opinion weakens the manga overall.
Secondly, the manga tends to be too formulaic, often to a fault. There's always the predictable few pages of the chapter where Amano's panties or bra get exposed. This happens in every chapter. I can't say I hate it because the artist clearly puts lots of effort into these pages but it gets old if you're reading multiple chapters in a sitting. The gags that lead to the ecchi scenes are predictable as well.
Thirdly, I strongly dislike Ma-kun's personality (or lack thereof). Often in mangas like these, the male protagonist is a weakling/nerd who spends more time on their academic pursuits and is very awkward around their love interest. This isn't necessarily a bad thing, but Ma-kun's character just doesn't pull off this trope very nicely. He's just too predictable, too uninteresting and too much of a wet blanket. He's a lazy self-insert for shutins and it makes me wonder if his personality was intentionally left as a blank slate, to make it easier for readers to put themselves in his shoes.
Oftentimes, part of what makes a manga of this genre interesting is how the 2 main characters interact. It often feels like Amano's relationship with Ma-kun is too one-sided. In fact, there was a perfect opportunity for Ma-kun to grow as a character and open up a bit with Amano during the Okinawa trip chapters but instead he said the most uninteresting nonsense about how he wants to work hard and study with Amano or something. It just bugs me how one-dimensional and flavorless his character is. I've read about 164 chapters of this manga and I feel like literally nothing has changed. Ma-kun is still a boring little weenie that does nothing but study, and Amano is the ditzy bimbo that orbits him and constantly gives him nosebleeds.
The art style isn't my favorite (and at times it feels a bit lazily drawn). Most of the effort seems to be put into the full-page drawings of Amano in her underwear.
Ultimately, this manga is a pretty tame, predictable semi-romance with a healthy dose of fanservice. If you want to see a girl spilling water all over her tits and flashing her ass constantly while the male MC sits there with a bleeding nose then this manga will give you what you want. The characters don't really seem to grow much and the actual storyline of the manga meanders quite slowly. Still, despite these flaws it's an entertaining manga. I give it a light 7/10.
