Group NU'EST's member Ren dressed up as a girl and took a self-camera photo.

Today, Ren posted on his Twitter, "The something that only I didn't know. Please be excited for Boy's Day. Don't forget to watch!" along with a picture.

In the picture, Ren was dressed up as a member of "Boy's Day" for the 400th episode celebration for MBC "Show! Music Core".

Ren had long wavy hair and makeup on just like a member of Girl's Day, showing off his beauty.

On this day, Ren and BTOB's Minhyuk performed as Girl's Day.

Photo Credit: Ren Twitter