On June 19, 2014, CJ E&M announced that Jung would release his second mini-album on June 26 of that year. It had already been eight months since the release of his
1st mini album, he finally has returned as a rocker after spending most of the time on TV, appearing in a number of TV reality programs. Though Some fans were even worried that his image would become stuck as a TV figure and not a musician due to his frequent television appearances on entertainment shows rather than musical activities and the delay of his next album, he didn't hasten to release the second album and just focused on making it perfect, as he referred that “It took me about eight months to prepare this album, which I felt was a very short period of time; but since the preparation process was really fun, I did not feel pressured to rush the new release." While he was preparing for
Teenager, Jung tried to let his fans participate in making his album and share the concept of album. He asked his fans to join in filming his music video as extras and opened up comeback site to share photos of their teenage years on
Instagram with the hashtag #IAMATEENAGER for a spot on the site. Starting on June 19, he unveiled all four teaser images that carry youthful spirit with the mischievous expression and contain special messages for the upcoming album, one a day, to complete a puzzle that consists of four pieces of images at last. On June 22, Jung revealed the track list for
Teenager through a street mural in
Hongdae, a neighborhood known for its lively music and artistic scene. After releasing the music video teaser on June 23, he released the music video for the lead single "Teenager" on June 25. The music video represents the concept of the album, "a dreaming adult", by portraying Jung as an office worker who has the free spirit of a teenager. Unable to withstand the restrictive atmosphere of the office, he escapes to perform in front of his fans. On June 26, 2014,
Teenager was released. ==Promotion==