The following review is based off my personal experience with playing this Game/Visual Novel... I try to be as brutally honest and detailed as I can, and these are my own opinions and thoughts, from one or more play throughs... The version this review is based on is v1.1.0...
Typical hentai visual novel/game, just with a anal sex focus...
The visuals of the characters are all 2D hand drawn typical hentai... Perhaps a tiny bit lower quality then the average with the characters... Same with the backdrops... He describes his own penis as being 12" long and very wide, but the visuals do not reflect that... And I'm sure if they did, it would look ridiculous, given his body frame visuals...
The script is pretty good as I rarely ran into any spelling/grammar errors... The plot revolves around a male protagonist super human who is one of 3000 or so men left in the world (an unoriginal theme I've seen used before in lots of other VN/Games)... He attends an academy filled with all women, and him being the only male in the country (of course)... He is super egotistic, perverted, and can do pretty much whatever he wants... He nicknames the academy the Anal Academy because he loves to primarily have anal sex with every woman he finds attractive... He even uses some sort of special lube that supposedly increases sensitivity (Really?)... He is also the son of the mad scientist, who caused the deaths of most men in the world...
He primarily focuses on a small list of women who somehow have different types of subtle influence over him, which he apparently doesn't understand or fully comprehend... To include the president of the country (island) this story takes place on... He is also obliged to help protect the country from attacks, being that he is a very strong super human...
I just could not get into this VN/Game, as the protagonist has an over the top personality, and I'm not a big hentai fan anyways... There really was nothing that drew me in about this VN/Game, and with so much anal sex, I just lost interest and didn't want to continue reading/playing... But you can tell there will be some relationships that occur, possibly even some love/lust interests, beyond the protagonists normal tendencies to have sex with any woman that walks and breathes... It's almost like it's a what if story, about a younger superman who is a pervert and horny all the time... Just riding that fine line between evil rape villain and do-gooder...
Overall, this is very much a typical far fetched hentai visual novel, with not much in the way of originality... Even the visuals during sex scenes are just a few stills and that is it, with some moments of no character visuals during text describing the sexual encounter now and then, as well... It all takes place in an alternate version of post world war 2 history, with combat mechs, super humans, and lots of anal sex with barely 18 year old women... It just shows me again how unbelievably low I.Q. and unoriginal most hentai tends to be... I'm sure hentai lovers who are into the specific fetishes this VN/Game focuses on, will like it somewhat... But I will not be revisiting it...