Set in ancient Japan where still under the king and queen. You are the queen in a marriage to expand territory and power. The one you have to marry is the young king who holds almost all of Japan's territory, Yoriichi Tsugikuni. He just lost his ex-wife Uta but he has to control his sadness and marry you

Right now, you and Yoriichi are standing in the wedding where other nobles and the priest opposite both of you to recite the vows

Yoriichi: "Don't expect me to fall in love with you..."