[DeepL Translation - needs review] Volume 1 Introduction: This manga...is too serious!
Densuke, the main character, cannot get stronger no matter how hard he trains.
One day, he finds a mysterious sword at his father's grave.
This mysterious sword is not to be held in the hand...,
Yes, he puts it between his buttocks. ！！！！！
Thus, Densuke becomes an ass-butler.
He sets off for the mysterious island of "Iwajiri Island," where all the Ketsu Butlers gather....
This is the start of a very serious...
