Earring | KPOP Demon Hunters (see variants)

When they aren't selling out stadiums, KPop superstars Rumi, Mira and Zoey use their secret identities as badass demon hunters to protect their fans from an ever-present supernatural threat. Together, they must face their biggest enemy yet – an irresistible rival boy band of demons in disguise.

Jinu is the secondary antagonist in the film KPop Demon Hunters. He was the leader of Saja Boys, a group of demons who masqueraded as a K-pop boy band. Once human, Jinu was cursed to become a demon through a pact with Gwi-Ma. Desperate to escape poverty, he accepted an offer of a powerful singing voice. However, the pact came at a cost, and Jinu was forced into a situation where he felt like he had to abandon his family. Centuries later, he agreed to help Gwi-Ma destroy the Honmoon in exchange for erasing his painful memories. To do this, he led the Saja Boys in stealing the fanbase of HUNTR/X, weakening the Honmoon and allowing Gwi-Ma to grow more powerful.

(from fandom KPop Demon Hunters wiki)