After releasing individual teasers, upcoming idol group M4M has now unveiled the music video teaser for debut track, “Sadness”!

Korea’s Cube Entertainment and China’s Xing Tian will be collaborating for project group called M4M (Mystical Formula) which will make a debut this March.

M4M will be debuting simultaneously in Korea and China. The members were all put together after passing rigorous audition rounds in China, Hong Kong and Taiwan. Cube Entertainment took charge in training the group for a total of 1,460 days.

“Sadness” will be released on March 12th.