Buta No Gotoki Sanzoku Ni Torawarete Instant

I need to make sure the review touches on the genre aspects: harem, romance, possible dark themes given the mention of necrophilia. The title "Piggish as the Three..." suggests a comedic aspect with the pig snout. The curse as a plot device is common, but the way it's used here to force a marriage is interesting. The childhood friend with a dark secret adds a layer of mystery or horror.