Rainbow has brought "Sunshine" to make your day just a bit brighter!

The group has returned with 'Rainbow Syndrome Part 2' after the Part 1 release back in February, making a quick comeback in just 4 months!

We've been teased with quite a few teaser sets, and like they all hinted, the girls continue on with the bright image with their new title track, as you'll be able to see for yourselves in the MV above!