I like her expressions and reactions, and the art is good, but...
Well, like some other reviewers have said, I share a similar sentiment in that I'm likewise not sure if I'd call this game corruption. It's more like the story of a withdrawn girl who interacts with other men that are similar to her in terms of personality, in order to break out of her shell and not be a "loser".
The classmate is also a loner or a shut in.
The shota is kind of a wimp and makes up fibs to fit in.
The 3 manga club members are all also nerds.
The guy on the phone can't talk to women.
The man she dates is the only one with half a spine, but compared to others he has less interactions if I'm not mistaken.
It takes around 4, maybe 5 or even 6 hours to get to the sex, depending on how quickly you're able to figure out the game's progression & how fast you read. The reason why I said that I wouldn't call it corruption, at least not in the traditional sense, is because she's the one who's actively engaging the men and pursuing all of the debauchery and not the other way around. She's never forced or pressured into anything, aside from the premise itself being the gimmick that if she doesn't get 1000 men to fap to her, she'll be lonely for life.
But that never feels like a meaningful or persuasive motive for her to suddenly do a 180 on her entire life, which until now she's lived in relative friendless seclusion. It really isn't compelling and it feels like an overused plot device. Think about it. She's forced to choose either A) or B), and since she chooses A), that she'll go along with it and do lewd stuff in order to not get cursed to remain alone for the rest of her life, it stands to reason that at that point she slipped on a banana peel that she placed herself and the end result will be her riding many dicks. Where's the corruption in that?
Although like I said, the reactions are good, especially of the sprite outside of CGs, the way the progression is handled leaves much to be desired. She's the one doing all of the events, she's the one engaging all the men, she's never approached, no event is about someone taking initiative (technically), and her reactions as she becomes ever "lewder" don't seem to match her lewdness. It's like some kind of dissociation between the art and the text, where it doesn't match at all. Initially she's way more embarrassed about minor things like flashing her panties, but as she gets more and more used to it, she becomes way more open to sex even though she says that it's super embarrassing, she doesn't show it. The reactions remain either similar to her initial embarrassed stuttering introverted self, or they become even weaker!
And I'm not even referring to her slut mode, after she becomes a professional dick rider. No, this happens midway, before any kind of sex even happens. The game's also very formulaic and doesn't really showcase her as lusting over men. She's either embarrassed or focusing on her mission to get the men to jerk off to her in order to fulfill her quota, rather than pursuing self gratification. While she does display some arousal, she never gets outright horny or shows particularly strong desire for the opposite sex. It all always comes back to the initial plot device, forcing her into it.
At all times the game feels like "it couldn't be helped", and because she's an introvert interacting with other introverts, it takes a while for anything meaningful to happen since neither her nor the men are particularly proactive once engaged in an event. It's almost like she's dating all of them, in essence it being some kind of vanilla game. It never feels like she's just used or abused. Everyone's too understanding and I remain unconvinced.