After graduating from junior college and completing two years of preparing for married life, Momoko Ijuin married Kouji Suzuki, her childhood fiancé arranged by their parents. Both the same age, they are 27 this year. Five years had already passed since their marriage. One day, her husband told her, "I want a divorce." When she asked what was wrong, he revealed he was in love with another woman. Upon further inquiry, it turned out the woman was apparently his former lover. Having met by chance, their old flame had rekindled, and Momoko agreed to divorce her husband. She had concluded it would be difficult to continue their married life, given his strange behavior over the past six months and his rare returns home for the past month.

Kouji, who had finally married his beloved, was at the peak of happiness. So he never realized. Why Momoko had so readily agreed to the divorce.