Praised for their live performances and self-produced songs infused with profound lyricism unique to the Korean language and vintage overtones, they have grown as one of South Korea's most influential rock bands.

The band rose to prominence and broke new ground in the Korean popular music scene that is almost dominated by idol groups for their critically acclaimed second album, Legend (2019), which exemplified a chamber pop style.

Jannabi has released a total of three studio albums, three extended plays, and one reissue to date; three of which have peaked in the top ten and nine singles on the Circle Chart.

Choi and Kim officially met at a Korean language academy in Bundang and hit it off, deciding to form a band together in high school.

[15] In 2013, Jannabi auditioned for Superstar K5 to raise their profile, with Kim and Yoo being eliminated and Choi joining the new group Plan B (플랜비), advancing to the Top 7.

[16] Choi later returned to Jannabi with Superstar K5 mentor Shinsadong Tiger, who helped them to set their direction and managed the group for their first digital single.

[17][18] In 2014, the release of their debut single album, Rocket, which was originally scheduled for April 18, was postponed due to the Sewol ferry disaster, expressing condolences to the victims.

[20] Originally titled Love and performed in the GOGOS 2 underground club in 2013, the song blended folk rock and reggae beats, with brass and piano playing in a jazz style, creating a unique feeling.

[20] On July 24, Jannabi won the grand prize in Penta Super Rookie 2014, a contest that selects new bands to appear at the 2014 Incheon Pentaport Rock Festival.

[23][24] On November 8, Jannabi participated as one of the Top 10 finalists for the Hongdae Street Song Festival, an event that discovers amateur musicians in celebration of Joy News 24's 10th anniversary.

[27] In the same year, Jannabi started participating in composing and releasing original soundtracks for Korean dramas, including Let's Eat 2, Ex-Girlfriends' Club, and Second 20s.

[44] Jannabi's eighth solo concert, "Stop, look and listen," at Ewha Womans University in June, sold out in two minutes and ranked first in the indie category of Interpark.

[48][49] Additionally, on December 30 and 31, Jannabi held their ninth solo concert, "Fantastic Old-fashioned End of the Year Party," which also sold out in the indie section with a market share of 38.2%.

[60] The lead single, "For Lovers Who Hesitate," gained massive popularity in South Korea, topping music charts dominated by K-pop idols with its retro sound.

[80]In February 2020, Jannabi's second national concert tour titled "Nonsense II" commenced, performing at sold-out venues, including the Olympic Hall and Kim Daejung Convention Center.

[82] In June 2020, Peponi Music announced Jang's temporary departure due to backlash over wedding news and military enlistment preparation.

[93][94] On October 29, Jannabi paid tribute to No Brain by participating in the 25th anniversary project of the band and releasing the cover of their song "Midnight Music.

"[95] On November 24, following reports about Yoon booked for assaulting a woman, Peponi Music responded that he has been promoting together with the band since his return as a guest, but is no longer under contract with the agency before he began his military service.

[109] Jannabi's third national concert tour, the Fantastic Old-fashioned End of the Year Party!, attracted 50,000 people over three months, from November 2022 to January 2023, leading to sold-out shows.

[120] From August to September, Jannabi had their sold-out 10th anniversary solo concerts in Seoul and Busan, titled Fantastic Old Fashioned 2024: Movie Star Rising.

[122] They created "A Ballad of Non-Le Jon" to pay homage to The Beatles, reflecting their cynical pursuit of the top and also the band's encouragement to those waiting for their time.

[123] Their debut album, Monkey Hotel, was primarily inspired by their old pop and rock of the 1970s influences, including Electric Light Orchestra, Player, and Gilbert O'Sullivan.

[126] The album, with a storyline, showcased their "complete musical freedom" from the success of previous works and explored genres such as baroque pop and rock opera.

[127][128] The band has also cited rock groups such as Simon & Garfunkel, Queen, Blur, Oasis, Black Sabbath, Led Zeppelin, The Beach Boys, Deep Purple, Pink Floyd, and Procol Harum as influences.

"[147] Music journalist Son Hye-min wrote: "Jannabi's charm is the atmosphere of the song that seems to create nostalgia for the past, the lyrics that can be a poem if you spread it out on paper and the emotion that contains more than just saying it is tacky.

[154][155][156] Choi was credited as the lyricist on their second studio album, Legend, and continues to do so on subsequent releases of the band while collaborating on music with Kim.

"[158] Kim started making music at a young age, with his mother providing support by buying equipment after receiving a CD of his self-composed songs in middle school.

[159] The band's lyrical content and composition tended to be classical, introspective, and poetically oriented, which unraveled the "complex emotions of youth" and "awakened empathy" among them.

[180][181] In March 2020, following the cancellation of their second concert tour, "Nonsense II", due to the COVID-19 pandemic, Jannabi donated masks to the locals of Daegu.

[184][185] In September 2022, Jannabi, who appeared at the Chilpo Jazz Festival, donated ₩20 million to Pohang for relief and recovery efforts after the city was hit by Typhoon Hinnamnor.