Nimura Kensuke is no ordinary freshman, he can see ghosts, and if that is not enough, his life becomes even more weird when he meets Kagura, who is able to summon a "Ga-Rei". The two end up working together in order to find evil spirits and devour them with the Ga-Rei.
Based on a series of light novels, Kure-nai is about the adventures and misadventures of 16-year-old Shinkurou Kurenai. Shinkurou is an authority in settling disputes between people, and is one day approached by Murasaki Kuhouin, the daughter of a powerful plutocratic family, asking him to be her bodyguard.