I've been looking for a hentai for years. It story line went something along the lines of a boy gets senr off to his neighbor to give her some food because she's a lonely alcoholic, but she ends up somehow telling him her vagina is a evil being and then he plunges her with a large bottle. I've honestly been searching for years, it's such a crazy story to remember and I haven't been able to share it with people because i can't find it. 😔

I think it's possible your memory might be combining more than one work together.......just my own memory, it kinda sounds that way to me......I remember the boy being sent over to the neighbor lady's house and her coming out as a succubus (and much sex ensues) specifically from a multi-part piece called/released under - [Takatu] The Succubus Lady From Next Door Ch. 1-3 [Eng] {doujin-moe.us} -

and I remember one with, again, the young neighbor boy being sent to the drunk milf next door with a plate of dinner (and much sex ensues, along with him getting kinda harsh on her with a big ol' bottle of beer or sake or whatever it might've been) from one called - [Bobobo] Osusowake | Food Sharing (COMIC Megastore 2011-03) [English] [desudesu] - but she wasn't evil.....well, just a drunken old lech, you know 😀

Dunno/didn't look to see if either of these were reported to MU or not........good luck finding what you're looking for 🙂