A request for a specific type of Futa Tenta/Monster doujin

Specifically, the ones where the heroine gets her futacock pumped and sucked from a tentacle/monster. There's not a lot of hentai sites with this specific tag (or any, except for like Rule34phael), if you want examples, redrum does a lot of em, A Certain Futanari Girl's Masturbation Diary Ch.2 would be a good one.