Talk:Monster Girl Quest: Paradox/@comment-25601391-20170826130402/@comment-26979215-20170829171746

"In-active characters equipped with Job Exp 2.0 from Grand Master Maid or a Hard Job Wrist. Active characters has 1 damager and 1 character that can sing. Singer uses MIRACLE SONG (ACADEMY DOLL LVL 4) for Triple Job Exp for Front Row only. Damager damages. Farm Mimic Island."

Miracle Song is from Academy Doll level 4. So you'll need a Doll to be your singer if you want to use Miracle song. I believe it's still called Miracle Song in Japanese. I also play in Japanese, but I don't really use that skill much, so I'm not certain. I'd check right now, but I'm about to run out the door.