Currently he is a fixed cast member of Comedy Big League, 2 Days & 1 Night, Amazing Saturday and Delicious Guys, and managed by FNC Entertainment.

He would wear a red toy car set and put on headphones while singing songs like Cho Yong-pil's "Empty Space," captivating the adults in the neighborhood with his cuteness.

He participated in a program called "Chasing the Stars" by a broadcasting company during high school, where he won an award for his impersonations, which became a stepping stone for him to enter the entertainment industry.

Additionally, he showcased his comedic talent in other segments of People Looking for a Laugh [ko], including the 'Fine Words Drama' corner, 'Pigeon Karaoke', and the Pyo's brother.

The movie centered around the story of Dong-gu, an overweight high school boy who entered the world of wrestling to raise money for sex reassignment surgery.

Moon took on the role of Song Young-bae, also known as 'Dungchi Won,' a senior member of Dong-gu's wrestling team (played by Ryu Deok-hwan).

Moon approached his role as a DJ diligently, engaging with listeners by reading their text messages and emails containing different life stories, which provided him with valuable learning experiences.

[13] Moon Se-yoon and former LG Twins cheerleader team leader Kim Ha-na tied the knot at the Ceritsu Wedding Convention in Nonhyeon-dong, Seoul on November 21, 2009, after dating for six years.

Kim Ha-na, who identified herself as a fan, reached out to Moon Se-yoon with a message, and from there, their connection grew from a friendship to a romantic relationship.