Subaru and his comrades find themselves in a dire situation after the city was taken over by the Sin Archbishops. Now, they are devising a plan to first reclaim the city hall...

Bishop Regulus of the Seven Deadly Sins wants to force Emilia to marry him, even though he already has hundreds of wives. While he is having the wedding hall prepared, Subaru and the others are planning to rescue Emilia and reclaim the city...