High School DxD: Dragonball Dark Roads

Issei Hyoudou is a sixteen-year-old second-year student at Kuoh Academy. He dies on his first date with his girlfriend, Yuma Amano, and is discovered by Kiriusha, an attendant of a dark goddess of destruction known as Greeta, also referred to as the Bunny Goddess. After his death, Issei learns that he is a descendant of a powerful alien warrior race called the Okami-Saiyan-jin, or Okami-jin for short. He must undergo training to defeat Greeta; otherwise, the entire Earth will be destroyed within two years. Can he succeed in his mission?