Mnet M Countdown' rehearsal The former photo call Event was held at Sangam-dong CJ E & M Center in Mapo-gu, Seoul on the afternoon of the 15th.
Group TWICE Sana, Dahyun have photo time.
news report
About TWICE
Twice is a South Korean girl group formed by JYP Entertainment. The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu.
 Wikipedia