“Would you mind dying right now?” — those are the last words high school pervert Issei Hyoudou expects to hear from his very first girlfriend, right before being brutally killed on their first date. But fate gives Issei a second chance at life when he is saved by the stunning Rias Gremory, a high-ranking Devil who reincarnates him as her Devil servant. As Issei is drawn into the centuries-old war between Devils and Angels, he learns the shocking truth: his girlfriend was actually Raynare, a Fallen Angel sent to kill him because he possesses a powerful “Sacred Gear” — a divine weapon bestowed upon humans by the Gods. Joining the Occult Research Club — the headquarters of the House of Gremory — Issei meets Rias’ other servants and is given the lowest rank, “Pawn.” Determined to rise through the ranks and fulfill his dream of building a harem of beautiful girls, Issei must battle Fallen Angels, rogue Exorcists, and master the dangerous power of his Sacred Gear if he hopes to survive.