@mug3n
I don't understand why you think this is just porn without nothing else when we have tons of mystery left unanswered yet. Look, I obviously will drop this series if it tits only, but there is potential it can be more.
Not to mention, your definition of borderline hentai is "fun". This story isn't supposed to be fun, it's supposed to left you wonder what development it will take. Why the heck elemination game is fun? Considering the MC in debt and stuck with criminal.
Funny you mention Prison School since I dislike it (also hate Raw Hero) because I think some of it jokes won't work if you take the art, lean too much to sexual innuendo and the last arc was too dragging. At least if you take the art of this story, it can survive (and probably even better). The characters in this story have more personality in beginning than women in Prison School too.
Do they slut? Yes. Do they have pride? No. All of these characters were horrible and obvious gold digger, but they have BRAIN. These women obviously smarter than one dimensional character in shoujo and shounen. The girls ARE fetishized, but they have distinct personality, background and reasoning. Like I said, these women live based on their assets, including their body. They didn't mind use it to get what they want is already part of early chapter. Even if this male sexual fantasy, what's the problem? It still has well written story so far. Shoujo is pretty much female romance fantasy, but if it's well written, no one have complain.
The problem is the fact that you're thinking this is hentai when it's more of survive elimination game (you know, like OTHER MANGA) that just happen to be extreme ecchi. Yes it jumps from sexy to serious to sexy, but at least the serious one didn't disrupted by ecchi art.
I understand hating the lewd art since it's not everyone taste, but disregard the fact that it has story and interesting concept?