In order to help her father, Chiwa Takanashi agrees to an arranged marriage with the company president, Hokuto Mamiya--a man she doesn't know--at the request of Hokuto's grandfather. Chiwa believes the arrangement isn't binding, but her new partner seems to think otherwise. Can two strangers living together find their way to a happy marriage?!

Hokuto resigns from Mamiya Commerce and takes on a failing company, risking everything to become heir in one year. Chiwa and Hokuto are closer than ever, so why is he saying they can't be a true married couple?