Mate
The Duo - Episode 1
S1 E1:
Two boys are born in a village on the same night: Chundong to a woman who ran away from the man who raped her, Gwidong to a nobleman whose wife dies immediately after giving birth. The nobleman forcibly conscripts the woman to nurse Gwidong, leaving Chundong behind in the care of the man with whom she escaped. When she learns that the nobleman has forbidden her from leaving his household, her maternal instincts compel her to switch the children so she can raise Chundong instead