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! Hiromi idolizes his older cousin Takane and will do anything to protect him—including running away from home! Takane’s got enough problems dealing with work exhaustion and Hiromi’s father itching to take him down, but maybe he’ll be able to find Hiromi with Hana’s help!