I notice this game is on Steam as well, do I get a steam key with purchase on Itch?

Hello! 

This matter is a bit complicated, but now is the right time to talk about it, so... sorry in advance if you get a wall of text as a reply (just refer to the TL;DR if you're not interested.)

I've been very dissatisfied with Steam as a developer. Yes, it is very consumer-friendly... which resulted in a lot of retractations (I'd dare say an absurd amount, but honestly, people have been mostly fair game, at least.) Also, the "currency regulations" that make the game be sold for $1 in Argentina is a bit excessive (especially when my motto is to treat everyone equally, and that most of my "Argentinian" customers happen to be from other countries, just to get it for a low price.)

With the release of v2.0 approaching, I am closing the Steam services. More reasons to this is all the padding of the Valve staff forced to verify the contents on the game, which takes literal weeks. (I planned a release for early January and only got it out mid-February...) and the quasi-incessant demands of steam keys from random streamers who don't even know the game but send copypastas trying to butter me up. (Yeah, sure, show hentai on stream and good luck making it out of Twitch without a ban lol.)

Instead, the game will stay on itch.io, Gumroad, and will additionally be sold on BOOTH for Japanese people.

TL;DR: I could give you a Steam key, but I don't think you'll find it very useful. The other way around, however, is recommended and possible with proof of purchase (even if bought at half price.)