This is Asakusa, Tokyo. A pug was abandoned on the banks of the Sumida River. A high school girl named Sally-chan named the dog Inu, but he - Inu - was the strongest dog, able to talk and somehow strong! Inu promised Sally-chan that he would live as a "normal dog", but dangerous people started to gather around Sally-chan, who is the daughter of a yakuza...! The turbulent daily life of Inu and Sally-chan is about to begin!