[1] Frontman Oh Hyuk was raised in several cities across northern China (Jilin, Shenyang and Beijing) for the first twenty years of his life due his parents' profession as university professors.

[6] Positive responses from critics and the public translated into their second EP 22—named after the band members' age at the time—charting in the top ten of the Billboard World Albums Chart two months after its release.

[citation needed] On July 21, 2015, Hyukoh became the first act to sign with independent label HIGHGRND, a subsidiary of Korean media conglomerate YG Entertainment.

The band frequently works with photographer Han Dasom and videographer Jung Dawoon (DQM), who are members of the creative group Dadaism Club.

In 2015, internet users suggested that their song "Lonely" was derived from "1517" by German-Norwegian band The Whitest Boy Alive, while "Panda Bear" was compared to Yumi Zouma's "Dodi".

[17] HIGHGRND released a statement on July 24 to address the rumors and stated that Hyukoh had received compliments on "Lonely" from The Whitest Boy Alive frontman Erlend Øye after performing the track as an opener for him while he visited Korea.

These suspicions were furthered by a now-deleted tweet from Beach Fossils suggesting Hyukoh had mixed "Golden Age" to create "Panda Bear".