Mc joins an all girls activity and have a bit of fun. He has such a feminine body that he could be easily mistaken for a girl. He uses this to dress up like one and join whatever he wanted to join where normally boys aren't allowed to join. He then finds a way to have his own little fun with the girls while his on the inside. It's almost crazy how he could hide his impressive size, before he wants to show it of course.
All girl activities:
(If you have any other ideas let me know)
(This plot could include these kinks depending on what we decide while building it)
Dubcon, blackmail, anal, rough sex, teasing, harem, cheating etc.
If you have a kink that's not listed don't hesitate to let me know and maybe I'll be up for it too.