I would cosplay as Allen Walker, then take my zanpakuto off the stand and unsheathe it. I would then get in a stance, ready to use the getsuga tensho whilst realising that I have already been hit by an akuma, at which point I would need to use the super spirit bomb to take the Akuma down with me.
I would then be rescued by Ichigo's spiritual pressure, and be taken to the soul society to which I would have to apologise for the trouble. Once that's over and done with, I go back home peacefully, only to find out my home is blown into pieces. At this point, I will have to stay at the black order and perfect the kamehameha.
I put a lot of thought of what to do if something like this actually happened. The first thing to do is run to japan! Anatatachi wa totemo tsuyoi de sho.