Actor Park Seo Joon posted a photo on his Instagram with Hyungsik and V, demonstrating a brotherly bond among the 'Hwarang' cast. The actors had attended BTS' concert in Seoul. The caption cleverly reads, "I recognized you at first sight," a line from BTS' "DNA".

SEE ALSO: In a follow-up interview on a YouTube show, Min Hee Jin admits that she considered methods for acquiring ADOR, but never acted on them

Another photo featured V with actress Ha Ji Won as the two looked like siblings in front of the camera. The caption read, "Every moment was a perfect stage just like a movie.  BTS is the best in the world!"

??? ? ???? ??

A post shared by ??? (@bn_sj2013) on Dec 11, 2017 at 1:19am PST

??? ???? perfect ???. ?? BTS. ????!?