My Stubborn Rival's Secret Love

Two childhood sweethearts become arch-nemeses due to a youthful misunderstanding. After an accident, the female lead fakes amnesia to prank the male lead. He plays along, pretending to be her boyfriend, treating her gently. During this act, she realizes his secret protection, and the misunderstanding unravels. They confess their feelings. After marriage, they continue their bickering-couple dynamic, turning their childhood sweethearts' bond into a long-lasting companionship.