This is the Disgaea of sex games. While this game does hardly anything unique or innovative, it has constructed a game that is grind. All games are grind, but we call grind that we like a "gameplay loop," instead. The loop here "need to have sex to get energy -> need money to have sex -> need energy to get money ->," is simple but effective, and in addition to the sex cg rewards, it also plays well to the classic RPG power fantasy of number go up. There is no fluff in that system. Unlike most of the "games" on this website, this is well and truly a video game.
I want to point out an additional highlight, which is how charming the heroine is. Nenena is willing to cheat on her boyfriend to prostitute herself, not because she needs money, but because she wants it. It is quite a feat to make such a heroine tolerable, let alone likeable. But the game manages to convince you that Nenena is kind, caring, and meaningful in spite of that. The dialogue is also a rare case of slang writing which isn't cringe.
All in all great game. If you like corruption/trainer games and this artstyle appeals to you, go for this game!
I want to point out an additional highlight, which is how charming the heroine is. Nenena is willing to cheat on her boyfriend to prostitute herself, not because she needs money, but because she wants it. It is quite a feat to make such a heroine tolerable, let alone likeable. But the game manages to convince you that Nenena is kind, caring, and meaningful in spite of that. The dialogue is also a rare case of slang writing which isn't cringe.
All in all great game. If you like corruption/trainer games and this artstyle appeals to you, go for this game!