'Secret Unnie' is a new JTBC show where a dongsaeng meets and spends time with a "secret unnie".
On April 24, Sunmi hinted at the upcoming episode via Instagram story. She is captured having a pajama party and playing around with dongsaeng Seulgi.
'Secret Unnie' airs every Friday at midnight KST. Make sure to catch the next episode with Seulgi and Sunmi!