They released a single, "Eiya-sa! Brother", in August 2013. They also released a second song, "Burikatsu-kun Ondo", as part of the Gotochi Character Image Song DVD, in March 2014. However, for this song, they were credited as "Okai Chisato with Mellowquad". After this, the unit became inactive.
In March 2016, Mellowquad's profile was deleted from the SATOYAMA movement official website.