When Lady Bertilu, a countess, wakes up, six months have passed. Her memories return, revealing that a person from another world, Minori, possessed her and managed to reconcile with Bertilu's hateful family and annoying fiancé in just a few months. Then Minori, after the possession ends, appears in this world in her original body. Bertilu doesn't care why she was possessed. Resenting her family and fiancé who readily accepted her after her personality changed, Bertilu dies of illness—or so it seemed. She finds herself three years in the past. Knowing she's fated to die, she decides to abandon her unloving family and fiancé and enjoy her remaining time freely. She proposes a contract marriage to the young head of the Duke Hubert family. "I love you, Bertilu." The Duke unexpectedly falls deeply in love with her.