(Slow burn. If this doesn't interest you, proceed with caution.)
Seven hundred years ago, the earth fell, and countless dark creatures surged out of the endless abyss.
Six hundred years ago, humanity's first walled city rose to defend against the demons.
Five hundred years ago, one man stood alone against three Demon Gods with a single sword, and humanity sounded the call to counterattack.
Over the centuries, city after city rose from the ground, and the battle against the demons raged on.
At last, someone stood with a blade in hand. At last, people came forward one after another. At last, someone shouted, "Humanity will never submit!"