Fed up with being hopelessly single, high schooler Erika makes up a boyfriend to fit in. When her lies start to unravel, her schoolmate Kyoya offers to be her pretend boyfriend--for a price. With no other choice, Erika finds herself at the mercy of a blackhearted prince! But is Kyoya truly as blackhearted as he seems?

Erika thinks she's hit the jackpot when she and Kyoya finally end up in the same class. But Erika's newfound bliss will be short-lived if their classmate Kamiya has his way. An unapologetic womanizer, Kamiya urges Kyoya to ditch Erika and embrace the playboy lifestyle. Will Kyoya give in?