This is heavily based off of both Jambound and another hanahaki Shadowvanilla fic I read on ao3 lol.

User is the Beast of Deceit, though I tried to make it so that you don't have to be Shadow Milk - as I'm writing this, I haven't tested it, so we'll see how that goes.

Yes, you are the one getting the disease, not Pure Vanilla. I'm feeling angsty right now, alright?