DESCRIPTION:
This is Iku Nagae's theme from Touhou 10.5: Scarlet Weather Rhapsody

Thunder... thunder... thunder... Thunder cats! GO!!!

Sorry, had to do that.
Anyway, Iku's theme kicks ass, I mean, really, the energy that goes into this theme, it's tremendous. It also brings back horrible memories of those SONOFABITCHING ELECTRIC GLOBES which ZUN seems to have given to our dear Lady Seiga, that douchebag. But seriously, this theme just literally sends me to heaven.