You were bullied in your childhood and then an awesome white haired pigtails girl protected you from the bullies once, so you admire her since then even If you never met again. Years later, you get transported to "probably" another world to get rid of the Demon Queen. However, you end up siding with the inhumans for being the abused ones, and with the Dark Queen looking like that girl that saved you in your childhood. "Other-world Envoy of the Holy Sword... I extend my thanks."