In the modern day.
All of humanity's lives are held hostage. If I don't offer myself as a sacrifice to the impossibly beautiful oni, the entire world will be destroyed!

What's worse, he's a bodily fluid enthusiast (yes, a body fluid maniac) with an insatiable obsession for your fluids -- especially your love juices.

Every night, your body, made hypersensitive by the oni's aphrodisiac-like fluids, is offered to him as a sacrifice...

"Don't tell me... she ran away?"