Explaining what something is, using the word in the explanation is unhelpful lol. Anyway, I can't name a single game I own where the MC is only a bottom. When it comes to gay stuff anyway. Games generally give you the choice on what you want to do, so by default the character is whatever you are. (Non-Linear stories at least).
If you don't mind text based stuff (With a little bit of visuals), Lillith's Throne has an option after winning combat, to still submit. And you can make it so all the characters who spawn are men.