"The gods want to possess the Grail of Sin, but I need it to save the person I love."
After losing everything he loved and being on the verge of death, Neizan is transported to an unknown world.
There, he encounters a beautiful girl in danger, whom he tries to save by killing her attackers.
However, his actions condemn him, and Neizan is imprisoned for his crimes.
His only chance for freedom will be risking his life in the imperial coliseum.
But the cruel emperor will do everything in his power to make his situation even more difficult.
Now, everything depends on his fight, which will determine his fate to protect the girl and the people he cares about.
