Don’t judge me: reverse harem academy type series with an eldritch pit monster as a side quest

-reverse harem at a school, I wanna say they were monsters/monster adjacent?

-definitely bully romance for at least one of the MMC

- one of the boys is like a zombie or a ghoul or something, his family has to sacrifice someone to a creature in a deep pit. The girl ends up getting tied to the beast and refuses to sacrifice someone for a month and she gets all rotten and smelly, like a corpse. When she finally pushes a body into to pit for the monster, she’s back to normal. THIS IS NOT THE MAIN PLOT OF THE BOOK, it’s just the most defining feature I can remember

- I wanna say the ghoul boy was definitely from a legacy family. I think the girl might have been critically injured and the only way to save her was to send her to the creature? Definitely coastal setting because they partied on the beach

-the students go party on a beach near some cliffs, a cave in the cliffs is where the creature hole is

-one of the boys is a voyeur, one sexy scene is when the girl is getting it on with one of the boys against a tree, and the voyeur boy is watching from bushes

- another sexy scene is when the mean boy drags her into a closet, they bang, and he makes her wear her wet panties with his cum (again, don’t judge me)

-no fae. I think the girl was also supernatural adjacent, or maybe was like, the strangely human daughter of an important supernatural, I don’t remember exactly.

-I think it was on kindle unlimited, so I don’t have the slightest clue what the cover looks like or the length.

-external to the school political intrigue, I want to say her father ends up being a super important political figure, I don’t think she knew him before going to school

I read it at least five years ago