"From this day onwards, I am your husband." Honoka Takatsuki, a 22-year-old woman, has harbored unrequited feelings for Kousuke Nagura, her father's subordinate, since high school. Kousuke is charismatic, attractive, and surprisingly kind. However, to Honoka's surprise, Kousuke becomes her husband one day. She is astonished by this sudden development, but Kousuke's whispered words - "Honoka..." - reassure her.