Wakeari Hakushaku-sama to Keiyaku Kekkon Shitara, Gijou (Roku-sai) no Keiyaku Haha ni Natte Shimaimashita.Wakeari Hakushaku-sama to Keiyaku Kekkon Shitara, Gijou (Roku-sai) no Keiyaku Haha ni Natte Shimaimashita; 訳あり伯爵様と契約結婚したら、義娘（六歳）の契約母になってしまいました。; Wakeari Hakushakusama to Keiyakukekkon Shitara, Musume (6-sai) no Keiyakuhaha ni Natteshimaimashita; A Temporary Contract Marriage That Turned Into a Real Family

Maria Martini, the daughter of a baroness, is contractually married to Count Ricardo Ricur for one year only. Ricardo's wife has been unfaithful to him and left him, and he has been repeatedly honey-trapped by women who want to marry him again. Maria's role was supposed to be a cover to protect him, but during the course of their life together, Ricardo's behavior became strange. The first thing that comes to mind is that Ricardo's stepdaughter, Lydia, is very interested in her new mommy. A contractual marriage begins a too-happy married life.