I love symphony orchestra. I love nico nico douga. When I first saw this, I almost died in happiness in front of my overheating notebook.
I was actually surprised that all of the songs in the medley transited to symphony orchestra beautifully. Some songs are expectedly awesome like 'The Last Wolf Suite' and some unexpected like 'Marisa Stole the Precious Thing'. This just shows how dedicatedly otaku japanese can be.