MAMAMOO's unit group MAMAMOO+ dropped the 'D-Day' poster for their upcoming debut single 'Better (feat. BIG Naughty).'

As previously announced, Solar and Moon Byul are releasing a new album as a unit group and have been preparing for their unit group debut. On August 30 at midnight KST, the girls released the 'D-Day.' 

Check out the teaser above. Meanwhile, MAMAMOO+ will be making its unit debut on August 30 at 6 PM KST. So stay tuned for just a few more hours!