Io Ai singer Kang Mi-na and Yoo Yeon-jung showed off their friendship.
Kang Mi-na posted a photo of her instagram with a heart emoticon on the 20th, and the two people who are taking a humorous Pose in the public photos are impressive.
Io Ai was formed through the cable channel Mnet 'Produce 101' Season 1 in 2016 and worked until 2017.