Tsugumi, who works in flight operation management at an airport, was leading a fulfilling life while studying to become an independent pilot. One day, however, her house suddenly catches fire! Tsugumi is about to escape when she is rescued by a handsome, talented, but domineering pilot, Chisato Amazawa. Tsugumi, unable to rely on her parents' house, asks Amazawa to let her stay with him for a while, but she is told to "marry him" as a condition...? What does this contractual marriage mean, a lifetime contract...?