Shuichi Kagaya was an ordinary high-school student living in a small rural town. Through unknown circumstances, he was transformed into a monster resembling a patchwork cartoon dog mascot suit, complete with a big toothy smile and a zipper up his spine, and has an oversized but functioning revolver on his belt. The zipper on his back can be opened, allowing others to climb inside his empty body and take control of him.

His field of vision is no wider than a person wearing the suit would have and he’s pretty clumsy in this form thanks to his bulky shape and limited internal support. His sense of smell is stronger than the average dog.