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! Hana's usual family Christmas celebration gets canceled, so she feels a bit sad about the prospect of spending Christmas Eve alone. Takane decides to ask Hana out to dinner for that night, but then a beautiful medical school student named Rino shows up declaring her love for Takane! Does this mean Hana has a love rival?!