Though CIRCUS just debuted, friendships can last a lifetime as Sena has been friends with Dal Shabet's Subin for the past 6 years and this selca proves it.

SEE ALSO: WA Entertainment releases the third member of CIRCUS named Seoyul

Both Sena and Subin trained alongside each other before Sena was dropped out of Dal Shabet and Sena left the agency to join WA Entertainment. Both girls posted this on their own Twitter and with different captions. Their long friendship showed fans how close people can be despite being in different companies.

Subin Posted: "Me and my unnie finally met as fellow artists! Its been 6 six years since we've met and I'm glad we could keep this long friendship. Fighting to CIRCUS! Fighting to Sena unnie!"

Sena Posted: "Thank you my dongsaeng Subin for coming and visiting CIRCUS' stage today:) Your support has boasted my confidence. Thank you for supporting unnie and we'll support Dal Shabet always!"

CIRCUS performed three tracks on today's 'Music Bank'.