[4] After graduating from Gwangmyeong High School in 2001, Kim enrolled in Department of Philosophy, Hankuk University of Foreign Studies, Yongin Campus.

They performed a skit dressed as military personnel, portraying the struggles of pork bossams who were envious of the popularity of chicken delivery.

Their act included lines like "General, the Tang Dynasty chicken unit is attacking" and "I'm rushing in with half-seasoned and half-fried food."

The production team consisted of PD Seo Soo-min and writer Choi Dae-woong, who were well-known in the entertainment industry.

[4][5] Kim Jun-hyun made his debut in 2006 in KBS's Laughter Club 2 [ko] in corner 'Mr Aristocrat', holding a wine glass alone and shouting "Cheers~".

[4][5] A KBS official who participated in the judging said, "The competition was fierce enough to increase the number of applicants by about 100 compared to previous year.

Successful applicants will meet their viewers through the KBS 2TV signboard gag program 'Gag Concert' after completing their training within a month.

The band was established by vocalist, Yoon Hyeong-bin [ko] as part of a show on Mnet's 'Moon Heejun's Music Rebellion', directed by Jo Eun-seok.

[11] Overaction performed on the live broadcast of 'Music Bank' at the public hall of KBS' new building in Yeouido, Seoul, on September 23rd, 2011.

Guitarist Lee Kyo-won, famous as the composer of 'Heo Gyeong-young Song', and Oh Kyeong-su, who was active as a drum sessionist in many concerts and broadcasts, completed the lineup.

"[7] Kim became a famous comedian in Korea by creating catchphrases and actions that even six-year-old children know, like saying "I have a good heart" and making a finger gesture to ask for a drink.

[5] Kim Jun-hyun, revealed that he was in relationship in his appearance on KBS 2TV's 'Starting Dream Team Season 2' broadcast on September 11, 2011.