After a temporal quirk sends thirty-six-year-old Katsuki back into the past, he unexpectedly meets twenty-four-year-old Y/N—a year before they’re ever supposed to cross paths. While desperately searching for a way back to his own timeline, he can’t help but flirt with the woman he’s already spent half his life loving, even though she’s never met him. Once the timeline is restored, fate brings twenty-five-year-old Katsuki and Y/N together exactly as it always intended, unaware they’ve unknowingly loved each other once before.