Epic Floor Design, although I'm not sure what the idea is. if laid with clear or glass tiles to see the design would be different, but to put black tiles over doesn't make any sense. I wonder if you get a magnifying glass to view the floor.
I just pinned this so I can memorize their names. It's impossible to get their names straight just going off of the music videos. xD-----manga vs anime makes it even more confusing. I read the manga before watching the anime