Stupid Demon!

It's been a year since Rin and Yukio Okumura had defeated their real father, Satan. Who knows what happened to him? No demons have attempted to kill Rin since that day. Now, Rin, Shima, and Bon are all second years and still attend the Cram School. Mephisto was released from prison, and Amaimon is still a small, spiky...