He hosted his own radio program titled Jung Joon-young's Simsimtapa on MBC FM from 2014 to 2015 and made his film debut in Love Forecast in 2015.

[8][7] On November 29, 2019, Jung was sentenced to six years in prison for the rape of multiple drunk unconscious women and for non-consensually filming and sharing sexual images of his victims.

He stated that he got inspired by Kurt Cobain and was determined to become a rock star after he watched Nirvana's MTV Unplugged show when he was a teenager.

[citation needed] In 2010, Jung dove into the Hongdae, Seoul indie music scene and formed various bands such as Flower Mist which busked in Japan and Switch On which performed for amateur club theaters.

[citation needed] During the Superweek, his low husky voice, appearance, and rather idiosyncratic personality appealed to the viewers as well as the judges, one of whom, PSY, was particularly impressed.

His covers that represented his rock style were "매일매일 기다려 Waiting Everyday" by TeeSams, "Bed of Roses" by Bon Jovi, and "Outsider" (Bom-Yeoreum-Gaeul-Gyeoeul [ko]),[21] whose performance received a positive response from the judges and audience.

On the fifth stage, he was urged to sing the rock ballad "응급실 Emergency Room" by IZI[22] which had been chosen by the viewers instead of via his musical taste.

[23] Though he was eliminated in the sixth stage of the semi-final from the top three, during his farewell interview Jung stated the following: "Superstar K4 was the turning point in my music career.

"[24] After Superstar K4, Jung had been doing concerts, TV and radio programs, modelling for cars, clothes, games, N-screen, and beer.

He has appeared in several TV shows including KBS2's Immortal Songs: Singing the Legend, Happy Together, MBC's Radio Star, and We Got Married.

[citation needed] He visited Taiwan in order to promote his first EP on December 8 and greeted 1,000 Taiwanese fans and had an autograph signing event with his song performances for those who had purchased a special limited edition of his album.

[34] Jung Joon-young participated in the OST for SBS's Modern Farmer, singing the song "Same Place" which is a rock ballad that tells a heart-breaking love story.

[36] Jung Joon-young made his big screen debut through a light-hearted romantic comedy film Love Forecast, which was released on January 14.

[37] Jung next starred in The Lover, a 19+ drama aired by Mnet, playing an unknown musician who is both living with and dating a woman 12 years his senior.

"공감 (Sympathy)", the title track, is a duet song recorded with Korean singer, Seo Young-eun [ko].

[47] On March 30, JTBC announced that Jung will team up with Kangin, Jeong Jinwoon, and Lee Chul Woo for a new reality show, Hitmaker, in which they'll be travelling overseas to try other countries' sports.

On February 1, C9 Entertainment announced that "나와 너 (Me and You)" was the name of the title track, it is a ballad song featuring a senior Korean singer, Jang Hye-jin.

[citation needed] On February 18, Jung's agency announced that the Chinese version of his first full album, The First Person, was released digitally on iTunes and KKBox that day in four countries, Taiwan, Hongkong, Singapore and Malaysia.

[54] Jung held his solo concert, Sing on May 19 and 20 in Shinhwa Cardan Square Live Hall, Mapo, Seoul.

[55] Jung appeared in 2018 World DJ Festival Anthem Compilation, performing a new track called Fly alongside Advanced on May 28.

[57] On July 13, Jung along with BTOB's Yook Sung-jae took part on the media launch of Viu original reality show called "Hello K-Idol".

[8] On March 11, 2019, it was alleged that in 2015 and 2016, Jung had secretly filmed his own sexual encounters with at least 10 women, then shared the videos with friends in chat groups.

[62][63][64][65] The following day, Jung retired from the entertainment industry, admitting to crimes that he had "filmed women without their consent and shared it in a chatroom".

[66][67][68][69][70] On March 21, Jung was arrested over allegations that he illegally shared sexually explicit videos of women taken without their knowledge or consent through a social media chatroom on eleven occasions.

[71][72] On April 19, 2019, a woman came forward to SBS funE, claiming that five men including Jung had raped her in March 2016 and then shared an audio file and photos of the incident in a group chat.

[73] On May 10, 2019, Jung pleaded guilty to all eleven cases of secretly filming and sharing the videos of himself having sex with women in a chatroom, and he sought to come to legal settlements with the victims.

[74][75][76] On November 29, 2019, Jung was sentenced to six years in prison and a mandatory education program on sexual crimes for gang raping drunk unconscious women.

[80] Upon his release, he was not required to wear an electronic ankle tag or disclose personal information, such as residential address and identifiable photographs in the sex offender registry, as it was being subjected to the judge's discretion in the initial sentencing.