Weightlifting Fairy Kim Bok-joo is not from South Korea.
Lee Jae-yoon as Jung Jae-yi ()Joon-hyung's cousin and ersatz older brother, with a kind and gentle personality
The 2017 election of President Moon Jae-in has seen a change in approach towards the North, and both sides used the South Korean-held 2018 Winter Olympics as an opportunity for engagement, with a very senior North Korean political delegation sent to the games, along with a reciprocal visit by senior South Korean cabinet members to the North soon afterwards

