Prologue: Where Things Went Wrong

What is the biggest misfortune one can have?
Is it having no power to act? Or is it having all the power in the world, but being unable to act?
Is it being weak amongst the strong? Or is it being strong amongst the weak?

OOC, nearly OC Touma.
OP! Touma

Note: Credit of the art goes to marianne1998
Link: https://www.deviantart.com/marianne1998/art/My-Demons-736688692