Girl group Nmixx is set to return with its fifth EP, “Heavy Serenade,” on May 11, marking its first release in about seven months. JYP Entertainment unveiled a promotional scheduler unveiled Monday outlines a series of teaser content leading up to the release. The rollout will begin with an album trailer on April 21, followed by a tracklist and motion poster on April 22. Promotional photos will be released on April 24 and 25, along with a special promotional website on April 26. Additional conte