One Piece: I Am a Dog

Doug traveled through time and became a dog? I can't bear it. Who asked my parents to give me this name? But what the hell is a little yellow earth dog!? I can't stand it. Fortunately, there is a system that kills creatures and strengthens them. Kill an ant, colonel's strength. Kill a cat and gain the strength of a lieutenant general. Kill a pirate? Why did the World Government surrender when I arrived in Mariejoia? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.