I'm Sorry Kang Nam-Goo(2016)

I'm Sorry Kang Nam-Goo is a Korean drama centered on a marriage torn apart by secrets and social ambition. Jung Mo-A and Park Do-Hoon share a bond forged in an orphanage, but their union crumbles when Do-Hoon discovers his true identity as the son of a wealthy family. He abandons Mo-A to marry Cha Young-Hwa, whose father wields considerable political power. The series explores themes of class, loyalty, and the cost of climbing the social ladder. As Do-Hoon pursues a life of privilege, Mo-A must navigate betrayal and rebuild her future. Tension mounts as the characters' intertwined pasts threaten to unravel their carefully constructed new lives.