When you begin your senior year of high school, you’re startled by the presence of a new transfer student named Carmilla, the most beautiful girl you’ve ever seen.

That night, you find yourself in a strange world of fire and brimstone, and two devils stand in front of you.“I have the power to make Carmilla fall in love with you. All you need to do is kiss me, and our contract will begin.”

Believing it to be a dream, you kiss them both, only for them to appear at your school the next day.Not only that, but they tell you that Carmilla is also a devil, and she has plans of her own…