Probably this review is not going to be popular, but it's OK. I'm used to be criticized in this forum for asking for more quality in games.
The initial premise of this game can't be more simple: a guy wins a lottery and goes to a hotel where he's the only man living with a lot of bimbos and can create his own harem... Well, it's an erotic fantasy like any other, and this kind of games are about erotic fantasies, so no problem here.
Problem is, all feminine characters are generic. I think there are like 20 characters, but they all are mostly the same. Yes, any character has a different 3D model, but that's all. You can have the same conversation with all the characters, and even specific interaction with characters are mostly the same. Some girls are "easier" than others, that's all. You don't even need to remember their names. I would prefer half of the characters, but better done. Not talking about the 3D design (although more diversity in body types would be good, IMO. All girls have big or huge boobs and slim bodies), I'm talking about writing: different personalities, more interesting interactions, more specific conversations, etc. Quality over quantity.
Also, the game has a lot of grind, but that's a common illness in this kind of games and can be reduced by cheat mods. Also, you can avoid with cheat mods the need of unpleasant behavior, like dropping pills into girls' drinks to "increase her lust" o "lower her inhibitions" or hacking their phones. It's just a game, it's OK if you enjoy that your character is an asshole, but shouldn't be a "normal" thing in the game, something that it's expected you do in order of getting the girl. You should be able to play as an ass or as decent guy, and there should be consequences according your choices. Maybe being an ass you could get some girls and lose others... something like that.
Anyway, it's not a terrible game. It´s enjoyable. I just feel it could be way better with a better writing.