"Mozaik Role" is an original song by DECO*27. It was uploaded to YouTube on January 19, 2014.

It took the song only a little more than 1 day (32 hours) for it to reach Hall of Fame, one month to enter the Hall of Legend, and two months to reach two million views. It entered the Hall of Myths on December 24, 2018, as the first entry which did not feature Hatsune Miku. It also has been covered by various utaites and has numerous arrangements. Hence, this is one of DECO*27's most notable songs, as well as one of GUMI's most notable songs.