The Reason I Got Engaged to My Ex-Boyfriend

전남친과 약혼하게 된 사정

After her twin sister is murdered, she takes the sister’s newborn and pretends to be the child’s mother to protect him. With no one to pose as the father, her troublesome ex steps in unexpectedly. As they hunt for the killer, his suspicious devotion grows, forcing her to question his true motives and her own guarded heart.