A war between heaven and hell is raging on Earth and hormonal fury is raging in Issei s pants. Enter curvy redhead Rias. She s president of The Occult Research Club, a club that doesn t actually research the occult. They are the occult and Rias is a Devil. If Issei can improve his mystical skills, he ll be able to help his hotter-than-hell master and her schoolgirl friends defeat their foes!