High school girl Erika may be on Kyoya’s leash, but she’s determined to break free and unleash his heart!

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?

Graduation is approaching, and Erika still doesn’t know what she wants to do with her life. Her family brings her along to a glasswork exhibition being put on by a relative in Kyoto, and she is stunned by the beauty of the pieces. She tries her own hand at glassmaking and is praised for her work. Now Erika is left to wonder if she should decide her whole future on a single experience.