My Happy Home(즐거운 나의 집)

Genius scientist Sejeong lives with her cyborg husband Sungmin. She erased Sungmin’s memories and inputted new customized memories and information of her choosing, so she is able to enjoy a blissful marriage. Then someone Sejeong and Sungmin knew before he became a cyborg starts coming to their home. This person tries to correct Sungmin’s distorted memories while Sejeong tries to stop her. Sungmin, in the meantime, starts lying like a human being. What happened before Sungmin was turned into a cyborg?