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?!

After she is attacked on the street, Chiwa suspects that Hokuto's ex-lover is behind it, so she decides to confront Misaki Shitara herself. Later, Hokuto and Chiwa visit his father in the hospital, and Hokuto comes to an important realization...