My Sign-in system in Marvel(AU)

Katarina wasn't normal as other girls, not only was her beauty compared to that of some models, she was also born as a futanari. she kept it hidden most her life, as a 24 year old that was easier said then done but she managed.
but one day she found herself in the world of Marvel with a Sign-in system!


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This is a warning that there will possibly be lemon scenes, it'll either be something that lasts a few sentences or something that lasts a chapter.
There will be chances of Universe Travelling, current worlds are as follows.
•Marvel (Girlfriend)
•DC (Girlfriend)
•Hotel Transylvania(a world to relax)
•Harry Potter(AU or Normal?)
and more to be thought of.
I do like the premise of this story so I might focus it more then my other two.