"If it wasn't me, you'd be divorced, right?" Sana married Keiichi, the most popular and perfect man in the company. A year and a half later, he, who should have been kind, was uncooperative in trying to conceive and turned out to be a swindler who oppressed Sana...! With the advice of her former colleague, Suzuhara, who worries about her, Sana gathers evidence of Keiichi's harassment. Still, what awaits Sana, who believes in their "vow of love", is the cruel "truth"-!! ….”