Go Younjung played the role of Kim So Hyun (21 years old) who is Jaein's (Shin Yeeun's character) childhood friend who got pregnant in highschool. Please be warned about getting "baby fever" while watching Younjung's character.

Go Younjung played the role of Park Yuri , Gilseob's caregiver who has medical training and asthma. She is notably a very courageous, strong character in the face of the monsters.

Go Younjung played the role of Jeon Ye Seoul who is a first-year student along with Joonhwi and Kang Sol A. Younjung was applauded for her one-take scene in a trial room where she testify against her abusive ex-boyfriend.
Law School is one of the series that plastered Younjung's name among Most Anticipated Actress Rookie.

Go Younjung gained widespreads acclaim for her leading role as Jin Buyeon/Choyeong/Naksu in Alchemy of Souls: Light and Shadow following her famous cameo in Part 1. She was praised for managing complex, dual roles, showcasing both fierce, assassin-like intensity and gentle, amnesiac charm.
This role established her as a lead actress, often cited as one of the "So-Youn-Ye" trio of 2020s actresses, alongside Shin Yeeun and Han So Hee.

Go Younjung played the role of Jang Huisoo who is Juwon's (Ryu Seungryong's character) daughter, and a student of Class 3-3 at Jeongwon High School. Huisoo has healing abilities which she inherited from her father.

Go Younjung played the role of Lee Jisu who is a novelist that has been in a relationship with Yeejae since they were college students.

Go Younjung played the role of Oh Yiyoung who is one of the first-year obstetrics and gynaecology resident at Yulje Medical Centre. Come with Yiyoung and other residents as they navigate the chaos of their work and personal lives, all in their quest to become exceptional doctors.