You're not missing much if you don't play the game. Basic trainer elements with the brothel and some fight scenes are about it, no actual story. In the end, it just comes down to going through the motions and a bit of grinding until you get to the sex scenes.I really enjoy the sex scenes but for the love of dick I cannot get myself to actually play this game. I just use the cheat and look at the sex scenes.
Still a pretty decent game overall and adds good Gay Sex Scenes that you won't find in most games provided for free.