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!

Takane's mother shows up from London and causes a stir. The big question is, can she possibly accept Hana's role in Takane's life? Things don't look promising, but perhaps a trip to the amusement park can mend the strained relationship between mother and son!