My Ex Is My Boss

Eighteen years ago, to raise the child of his late sister, Jack chose not to burden Anna, whose future was bright, and heartlessly broke up with her despite their passionate love. Eighteen years later, Anna has risen to become the president of a group corporation, and Jack reunites with her — this time for the study-abroad quota of his adopted daughter, Amy. Convinced that Jack had abandoned her back then because he had an affair and fathered a child, Anna deliberately makes things difficult for him, taking revenge for her old heartbreak.

Jack endures every humiliation — even kneeling before Anna for the sake of his daughter's future. The conflict escalates until a violent clash erupts at the factory, where an equipment explosion accidentally leaves Jack gravely injured. During his blood transfusion at the hospital, his secretary Nicole stumbles upon a startling secret about blood types: Jack, with type O blood, could never have fathered Amy, who has type AB blood.

In the end, Anna finally learns the truth behind the whole misunderstanding. She gives up her hard-won overseas position and rushes back to Jack — the man she has truly loved for all these years.