So do you get raped by the loser and/or get to rape the loser? 
An H-game where the main character is a girl ?
Of course you get raped more than 9000 times.
The flash boxing reminds me of an actual H-Game where you do some sort of sexy wrestling.
Main character of MOON. is a girl =P
Huh⌠well, it doesnât have to be rape or anything - but having no sex kinda defeats the purpose of having it an eroge. It just becomes a âcheap thrillâ title⌠which I can get off sites like New Grounds. 
Not being negative or anything - but IMHO, I wouldnât even get a game like that. Now if you made it a b-game - ditch the ero entirely - thatâs a different issue. Its a non hentai b-game. But if youâre calling this an eroge - you need more ero. I think your gimmick is okay, but your target market is completely off. Full frontal nudity donât make a pornâŚ
The âbâ is for bishoujo, or pretty girl in english.
Assuming you could find an artist, I donât see any reason why this game couldnât be made in Flash, given how simple the mechanics are. As a plus, the name of your game would be an amusing pun as well if done this way.
There was a game with a story/plot somewhat close to that. 
The title is VARIABLE GEO or V.G. in short, an old erogame from WEB-GIGA with many sequels. The fighters were waitresses in a Martial Arts Championship were the loser would be forced to strip herself and in some cases be raped.
If iâm not mistake, there was a fighting-game version for the Old Consome Sega Saturn, a 3-parts O.V.A. (Original Video Animation) and even a H-Anime with the same name.
More about the older games of this series here.
Actually, I was suggesting making it yourself with the help of more knowledgeable/skilled people, but you can pitch your idea to somebody else if you really want to do so.