Where to watch Firstborn in the US
Firstborn isn't currently available on any subscription platform in the US.
Availability updated November 3, 2026.
Firstborn plot
The plot isn't available yet.
K-Drama Diary › Firstborn
K-Drama Diary › Firstborn
Firstborn isn't currently available on any subscription platform in the US.
Availability updated November 3, 2026.
The plot isn't available yet.
