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?

School's back in session, and though Erika is thrilled to see Kyoya again, she totally bombs her midyear exams. Faced with the prospect of Erika being held back, Kyoya offers to tutor her--at his place! Will Erika be able to get any studying done?