Help finding a game

[Kuragari]

https://www.youtube.com/watch?v=4lyDbLF3msc

This vid for this NSFW game popped into my feed, and I'd really like to be able to find it and download it if anyone happens to know where it's hiding. It's called Succubus and is a 16-bit platformer, apparently at one point it was on 4chan but I have no idea how to find it there or if it's still there.