Chinami, who works as a nurse, was persuaded by her husband, Masahiro, who was in the hospital, to get married. However, Masahiro was sloppy with women and after a while of being together, the bug of cheating began to repeat the tingling play with women. Masahiro has a child named Tatsuya who was born between his ex-wife and lives with three people. ●Tatsuya, a high school student, hates his cheating father, but worries about the kind-hearted Chinami. One day, Tatsuya sees Chinami looking sad as she patiently waits for Masahiro, who doesn't come home until midnight.
