Shin Jun Seop is a South Korean singer, dancer, composer, actor and former member of MYTEEN (마이틴). He graduated from Jangchung High School.

He made his debut in 2017 as the group's rapper and visual with their first EP, "MyTeen Go!" and he made his acting debut in 2018 with a role in jTBC's "My ID is Gangnam Beauty" (내 아이디는 강남미인).

In August 2019, The Music Works (뮤직웍스) decided to disband the group as the group members were more focused on individual activities at the time.

He enlisted for his mandatory military service on December 14, 2020, and was discharged on June 13, 2022.

He is currently represented by 51K (피프티원케이).