Tsumi na Propose

Charlene's parents died ten years ago, and her former boyfriend, Brand, abandoned her at the time. She has not forgiven him, as his absence contributed to the loss of her younger sister, Cissy, to their harsh relatives. Cissy was raised by their aunt and uncle and has become self-centered and defiant. One day, Charlene discovers a baby on her couch, accompanied by a note from Cissy revealing that Brand is the child's father.