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?

When Erika turns Kyoya down for a date to help one of San's younger brothers shop for San's birthday, Kamiya points out her story doesn't add up. After some snooping, Kyoya is shocked to find Erika meeting up with a tall and handsome stranger! Shaken to his core, Kyoya can't even bring himself to go to school the next day. Can the pair survive this apparent betrayal?