At first when I started reading this series, I found it pretty entertaining. But you start to notice that many chapters have absolutely no plot development and the same things happen, just drawn at different angles. The angle that annoys me the most is the upskirts, especially when there's dialogue as if her sweaty snatch is talking.
The ecchi crap is the only thing that keeps this series going, not that it interests me in the least. Revealing, pointless angles of one girl's tits and twat takes up 1/4 to 1/3 of all the panels (exaggerated estimate, but not by much). This is purely a fan service manga with a some comedy (mostly toilet and sexual-ish humor) and plot (if you'd call it that). The story progresses so slowly because of all the fan service and it just becomes stale unless you really like seeing essentially the same image of a scantily clad, sweaty cartoon girl, who apparently has no nipples or they're on the underside of her tits, from slightly different angles. Personally, I'd enjoy to see a bit of drama that doesn't revolve around something ecchi.
I find most of the characters generic, but most manga is the same in that area. The principal is, IMO, the only original character. The setting is very original and is the ONLY reason I've kept up with the series, although I usually skim through many pages. I do like the principal, though.
What I don't understand, like somebody else said, is why the boys don't stand up for themselves when they're getting the shit knocked out of them. The only person who has a reason to stay there is the MC because of a love interest (another generic love interest where the MC acts like that's the only girl in the world he could be with), so I don't see why the other guys don't go berserk or leave. Yeah, the story could lose some of it's pizazz (for lack of better words), but it could also open up new events, such as new male students or one of the boys who leave could help them from the outside. I know this is a manga, but it doesn't mean it's impervious against flaws. Using "it's a manga" defense is something a child would say. That's equivalent to a television show about people who sit on a couch and fart the entire time and saying "it's just a TV show."
One last thing which befuddles me is why some people comment here just to disagree with another person or persons who dislike the manga. Everyone is entitled to their opinion, so who cares?
@Dickegrobe- I think everyone (at least guys) have done something their not proud of, especially when it comes to masturbation and drunken sex 🤣 Though I doubt that's the reason many people dislike this manga. The common theme for these "naysayers" (not a hyphenated word BTW) is the excessive fan service. Yeah, I'm an asshole and a hypocrite, but I couldn't help but to point out the similar points.
tl;dr A LOT of fan service, insubstantial plot, original setting, story slowly progresses in most chapters, and primarily sophomore humor. If you like you manga with lot of nearly nude moments, then this one is for you.