A plausible Sweet Home season 3 theory indicates that Hyun-sus character arc will only get more tragic. Song Kang leads the cast of Sweet Home as Hyun-su, who becomes contaminated with a monster curse at the beginning of season 1 and has to learn how to control it. Hyung-sus status as a neo-human set the narrative for his story in season 2, which saw Song Kangs character protecting his friends from afar while battling Ui-myeong. However, as the stakes continue to increase, Sweet Home season 3 might see Hyun-su having to make an impossible decision.
https://screenrant.com/sweet-home-season-3-theory-hyun-su-choose-humans/