TXT thanked their Big Hit Entertainment labelmates BTS after the new group performed for their first time on a music show!

On March 7, TXT made their “M Countdown” debut when they performed “Crown” and “Blue Orangeade” on the weekly music show.

Later that evening, they shared a photo on Twitter with all the members of BTS, which appears to have been taken at Big Hit Entertainment.

TXT expressed their gratitude to their sunbaes (senior artists) in the caption as they said, “We sincerely thank our sunbaes who took the time to tell us so many good things and gave us sincere advice, despite being busy. We will work hard so that we can be respectable junior artists! We love you, sunbaes!”

바쁜 시간 내서 저희에게 좋은 말씀, 진심 어린 조언 많이 많이 해주신 선배님들께 진심으로 감사합니다ㅠ 부끄럽지 않은 후배 될 수 있도록 열심히 하겠습니다! 사랑합니다 선배님들❤️#방탄소년단 #TOMORROW_X_TOGETHER #BTS #TXT pic.twitter.com/AmANJRBqfG — TOMORROW X TOGETHER (@TXT_members) March 7, 2019

BTS’s Jungkook replied, “This is Jungkook hyung. Don’t get sick and good luck with your promotions.”

“Hyung” is a title used by a male to an older brother or male friend. Many fans are emotional thinking about how Jungkook, who is the youngest member of BTS and has therefore rarely been seen by fans being called “hyung,” is now an older brother figure to the younger group TXT, and “Jungkook hyung” quickly began trending worldwide on Twitter.

TXT made their debut on March 4 with “The Dream Chapter: STAR,” featuring the title track “Crown.” Their debut release topped iTunes Albums charts around the world, and the music video for “Crown” broke the record for most views in the first 24 hours by a K-pop group debut MV.