"High School DxD" is a manga series adapted from the light novels written by Ichiei Ishibumi, with illustrations by Miyama-Zero. The story centers on Issei Hyoudou, a perverted high school student who is killed on his first date by a fallen angel. He is resurrected by Rias Gremory, a high-ranking devil and the president of the Occult Research Club at Kuoh Academy. Issei becomes Rias’s servant, joining her peerage of devils, and discovers a hidden world of angels, devils, and fallen angels engaged in a complex power struggle.

The narrative explores Issei’s growth as he navigates his new life as a devil, balancing his responsibilities with his often comedic and lecherous personality. Rias Gremory, the heiress of the Gremory clan, serves as his mentor and protector, while other members of the Occult Research Club, including the stoic swordsman Kiba, the fiery Akeno, and the shy Koneko, become his allies and friends. The group faces various threats, including rogue fallen angels, rival devil factions, and supernatural entities, often participating in high-stakes battles and Rating Games—a competitive system used by devils to settle disputes and gain prestige.

As the story progresses, Issei’s latent powers, particularly his connection to the legendary dragon Ddraig, begin to manifest, making him a key player in the ongoing conflicts. His relationships with Rias and the other female characters deepen, often blending romantic tension with comedic and dramatic moments. The series incorporates themes of loyalty, ambition, and self-discovery, set against a backdrop of supernatural intrigue and action-packed confrontations. The manga maintains a balance between its ecchi humor and more serious plot developments, appealing to fans of both genres.