Goodbye, In-Law!

In the tangled, unforgiving world of high school, first impressions are rarely kind. For Han-Eol, Da-Hae was nothing more than a cold-hearted bully who made his teenage years miserable. For Da-Hae, Han-Eol was an arrogant, insufferable jerk who embodied everything she despised. Their shared animosity was a bitter constant, a rivalry that defined their youth and seemed destined to follow them into adulthood—until a twist of fate bound their families together in the most unexpected way. Years later, they are forced to reunite not as enemies, but as soon-to-be in-laws, their siblings deeply in love and on the cusp of marriage. But just as the past seems ready to be buried, a devastating tragedy shatters their fragile truce, claiming the lives of the newlyweds and leaving Han-Eol and Da-Hae drowning in grief and guilt. Haunted by the crushing weight of what-ifs, the two are granted an impossible second chance. They wake to find themselves back in their high school days, their siblings alive and oblivious to the dark future that awaits. Thrown into a frantic race against time, Han-Eol and Da-Hae must set aside their old grudges and join forces, armed only with the fragmented memories of the future and a single, cryptic diary that may hold the key to changing fate. As they navigate the treacherous halls of their youth and confront their own unresolved feelings, they must piece together the clues that could rewrite their siblings' tragic story. But the past is a stubborn thing, and as they fight to forge a new destiny, they soon realize that even the smallest changes can send shockwaves through time—and that some threads of fate may be impossible to untangle without sacrificing everything they once believed about each other.