There are pretty much minor choices that determine what gags the player uses as of right now, no multiple endings or anything crazy like that for my first game. So I'd say closer to a Kinetic Novel.
And the MC is whatever gender the players is/wants them to be! I'm making it as ambiguous as possible so the player can see themself in the MC like you said!
I might have to do that to see if I like how it's presented. Even going ambiguous, there's ways to make the bondage sexy, and that's more what I want anyway, even if it's just through text. :P
Then again, I suppose genetelia can't be mentioned so... Hm... Unless it just says 'chest' and / or 'Nethers,' which are ambiguous enough to let the reader determine what it is.
Oh, I guess the other question I had is: can you train the girls to become doms or is the only relationship you have with them being to tie them up?
EDIT: Oh you teasing little... :P That wasn't what I meant when I said I wanted the MC tied up. xD