The story follows Cha Ju An, a reality TV producer whose dynamic daily life feels like a show of its own, and Yoo Do Jin, a disciplined pro tennis player who treats life like a competition. Though they lead very different lives, both are driven individuals who put their own happiness aside. When they begin unexpectedly swapping bodies for exactly one hour each day, the experience brings laughter, relatable chaos, and heart-fluttering romance as they come to better understand each other.

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