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 accompanies the Nonomura family to Kyushu, where Hana’s grandparents live, so that he can celebrate the new year with them and get to know them better. But when Hana’s grandfather becomes enraged with him, what will Takane have to do to get his engagement to Hana out of jeopardy?