When the Hell-Raiser king returns from Hell after thousands of years of slavery , he's starving for the blood of humanity once again, along with his remaining sons and General. Natsu and the others are just ordinary students with special powers at a academy for hunting demons. With help from teachers , strangers , and each other, will they defeat the Hell-Raiser king? Or will they be dragged down to hell with him? -----
29 parts