A strong-willed high school girl and a hot young scion of a business empire can't help trying to outwit each other every chance they get... But could these opposites be conning themselves out of the perfect match? After her older sister refuses to go to an arranged marriage meeting with Takane Saibara, the heir to a vast business fortune, high schooler Hana Nonomura agrees to be her stand-in to save face for the family. But when these two utter opposites pair up, get ready for some sparks to fly Valentine's Day rolls around, and Hana wonders what she should give Takane even as she struggles to hide her feelings from him. Meanwhile, Hana's father poses a question to Takane--exactly how long is he planning to continue his arranged marriage relationship with Hana?