itch.io

If I buy it on itch.io, will I be able to get a steam key so I can also have it on steam? (sorry if this question comes off any sort of way, I have just never bought anything on itch.io before so idk how it all works)

It happens whenever I get to the part where the MC tells Kayden that she has something she'd like to see him in. Whenever I click to proceed after that a gray screen pops up with some type of code and I have to close the game. 

It might just be a me thing, but whenever I try Kaden's route the game crashes. It happens every time :( I even tried deleting the game and trying again, but the same thing happened.