Group Shinhwa revealed a picture of themselves in school uniforms.

Yesterday, cable channel tvN "SNL Korea" Facebook posted up a picture of Shinhwa's members Shin Hyesung, Lee Minwoo, and Eric in school uniforms, posing for the camera.

The members were also holding up a sketchbook that said, "If there are more than 150,000 likes, the secret picture will be revealed," arousing curiosity.

"SNL Korea" with Shinhwa members as the hosts will be aired on May 4.

Photo Credit: SNL Korea Facebook