1. The Jeju Separation: After sharing their passionate initial kiss, Da-rim vanishes without giving Ji-hyeok her real name due to her mother's sudden emergency, leaving Ji-hyeok searching for a 'ghost'.
2. The Fake Identity: Da-rim borrows photos of her childhood friend Kim Seon-woo’s son to pass off as a married mother to land a temporary job on Natural BeBe’s Mother TF team.
3. The Guilt and Reveal: Ji-hyeok agonizes over falling for a woman he believes is married. In Episode 9, after confronting her, Da-rim tearfully reveals she is single and childless, relieving Ji-hyeok's moral conflict.
4. Corporate Sabotage: The leak of Natural BeBe’s flagship baby carrier design to rival company MomsJoy is revealed to be an inside job orchestrated by executive saboteurs aligned with Ji-hyeok’s tyrannical father. Ji-hyeok uncovers hidden audio recordings and financial proofs to clear Da-rim's name.
5. The Finale Accident and Resolution: In Episode 13/14, after vindicating Da-rim, Ji-hyeok is struck by a vehicle while protecting key evidence, resulting in temporary amnesia. His memories are fully restored when he meets Da-rim at the Jeju cliffside where they first kissed. The corporate villains are ousted, Ji-hyeok's mother reclaims her company rights, and Ji-hyeok and Da-rim get married.