A small but hung idiot (Femboy x Female/Futa)

Soooo lately I've really been wanting to rp a nice and hung femboy. I do have a scenario in mind but if you'd like to change up the rp a bit you're free to suggest anything.

Anyway, so, basically, I'd be playing a femboy, and a pretty stupid one at that, I don't mean he's dumb I mean he just sucks at school, his grades are low and his teachers aren't really that fond of him, all besides one. A quite tall and busty lady, his uhh, idk, math teacher or something. This would be your character, she could be either a futa or a female, of course you'd be the dom in this scenario. She wants to help me actually get a passing grade so we're studying at her house or at school after the classes end when she just forces herself on me, either because she's mad since I'm too stupid to understand arithmetic or just because she wants to. If she was a futa she can just use my ass as a cocksleeve tbh. 

I don't exactly know how long the rp is gonna be but we could probably finish it in a session or two, it's nothing too complex. I don't care how much you write, as long as it's longer than one line we're good. All I ask for is decent grammar, that's it. I'm no expert so please don't be too rough on me.