SPEED's "Sad Promise" teaser was released earlier than scheduled after it was leaked.

Core Contents Media today officially revealed the teaser of their second track that was scheduled to release on December 31. However the video was leaked online due to an accidental error during the video editing process between employee and editors.

The leaked video was taken down and a modified version of the teaser was shared by Core Contents Media. The agency stated the video is to be 19+ rating because of the violent scenes.

Teaser video features Park Bo Young, A Pink's Son Naeun, Ha Seok Jin, Ji Chang Wook, as well as Choi Ji Yeon, Kim Young Ho, Choi Minah and Jung So Young.

"Sad Promise" will be released on January 7.