Doesn't steam allow NSFW games?
I mean, we can't buy this game from itch or steam right now, so everybody who is outside of Japan, like me and Castlekill won't be able to buy the game, like, at all
I've never heard of those other sites featured on the page, nor do i trust them with any sensitive data! Plus, i can't read japanese and google translate kinda sucks
At this point, dev could just host a patreon, link to it, and allow patreons to download the game and then cancel their subscription