(2020)[1][2] and Lee Se-jong - youngest son of the protagonist played by Ji Hyun-woo in Young Lady and Gentleman (2021).
(2020), the latter role where he played a girl, Cho Seo-woo, who is the daughter of the protagonist, Cha Yu-ri, who is portrayed by Kim Tae-hee.
Seo was cast due to his striking resemblance to Kim as well as his stable acting abilities, although his costumes, dresses and long hair had some netizens concerned about gender identity.
[3][4] In 2021, he made his face known by appearing in weekend drama Young Lady and Gentleman as 6 year old cute kindergartener.
He is appearing in iHQ's romance thriller TV series Sponsor, which began airing from February 23.