K-pop star Bain in a concept photo for Just B's album 'Just Odd.' Photo from Just B's X account

Bain, a member of the K-pop boy band Just B, came out as part of the LGBTQ community during the group's concert in the United States, based on videos circulating on social media Wednesday.

The development marks a rare instance of a K-pop idol publicly coming out, as openly identifying as LGBTQ remains uncommon in South Korea. 

"I'm f*cking proud to be a part of the LGBT community," Bain said in the videos reportedly taken during the Los Angeles leg of Just B's "Just Odd" tour.

In the same show, Bain performed Lady Gaga's "Born This Way" — an anthem of empowerment among the LGBT community — with clips showing him waving a rainbow flag onstage during the number.

Bain, whose real name is Song Byeong-hee, debuted in 2021 as a member of the six-piece Just B.

In March, Indian-American singer Lara, a member of the multinational girl group Katseye, co-managed by K-pop powerhouse HYBE, came out as queer, according to reports.

Same-sex marriage is not legally recognized in South Korea while strong social stigma continues to keep many in the closet. Annual Pride events also face fierce opposition from conservative Christian groups.