High School DxD, Vol. 7 (light novel)

After a perilous start to the semester, peace is finally returning to KuouAcademy. At least, until Odin, a god from the Norse pantheon, shows up. Dealingwith the lecherous old man is tough enough on its own, but a sinister group isalso plotting to kill him. Issei and his friends will have to pull out everytrick they can manage to make it out of this one!