[7] He would go on to take part in songwriting and production for other musicians, including on Urban Zakapa's "Another Me" (2015) and Kkal & Maxx's debut record Caffe in the Morning (2016).

[6] Peakboy joined the music crew Juicy Wave after having it suggested to him by rapper Kyu Young.

[3] In 2017, Peakboy uploaded his debut single "Gin & Tonic" onto audio sharing website SoundCloud and he began receiving contract offers from various companies.

[9] Peakboy signed an exclusive contract with Neuron Music and released the single album 05/27 through the record label on August 23, headed by the electronic hip-hop track "Birthday" with Hanhae as its featured guest.

[10][11] Peakboy penned the track in four days, which was influenced by his stay in the United States two months earlier.

[15] Peakboy's third mini-album Loop, fronted by the lead single "Diet" featuring Wheein of Mamamoo, was released on August 18, 2020.

[5] Writing for Atstar1 magazine, editor Hwang Yeon-do described Peakboy as one of the few musicians with a good musical tone, skilled rapping, and talented capabilities as a singer-songwriter.