Art themselves are from: Kakumei Dualism - Nana Mizuki ×T.M.Revolution ( Cover ) / VESPERBELL - https://www.youtube.com/watch?v=p3Ijg32W8A0

I've been looking for the full picture where they are together, but outside of screenshotting one from the MV, I can't seem to find it. From what I can tell, he artist and the Vesperbell account didn't upload a full and clean image of it.