Singer EXO D.O., who is serving in the military, made a surprise visit to EXO Concert.
On December 31, last year, EXO's official SNS showed pictures of EXO D.O., which was taken with members in the Concert waiting room.
EXO D.O. in the photo is posing with members wearing a defense T-shirt. EXO D.O., who joined the military in July last year, visited the Concert chapter to support the members.
EXO held a solo Concert at Seoul Gymnastics Stadium from December 29 to 31 last year and met with fans.
About EXO
Exo is a South Korean-Chinese boy band based in Seoul that was formed by SM Entertainment in 2011 and debuted in 2012. The group consists of nine members: Xiumin, Suho, Lay, Baekhyun, Chen, Chanyeol, D.O., Kai and Sehun.
 Wikipedia