Chinami Matsukawa, who works as a nurse, was wooed by her husband, Masahiro, who was hospitalized, and they got married. However, Masahiro was promiscuous, and after a while of being together, he started cheating on her repeatedly. Masahiro has a stepson named Tatsuya from his previous wife, and they live together as a family of three. Tatsuya, a high school student, hates his father who only cheats, but he was worried about the kind-hearted Chinami. One day, Tatsuya saw Chinami's lonely figure, patiently waiting for Masahiro who didn't come home even late at night, and...