In a world where evil spirits and bizarre phenomena are commonplace, the profession of exorcist has become an established part of society. Promising young talents study at Taima Academy to hone their abilities. There, student Haruhisa Furuya is burdened with a cursed power known as Climax Exorcism—a single touch forces any living or dead target to orgasm, thereby purifying and banishing evil spirits. The ability is profoundly embarrassing and socially ruinous, making Haruhisa an outcast at the academy. His fortunes change when he meets Misaki Souya, a girl who wields the Lust Demon Eyes, a terrifying ocular power that effortlessly exposes a person’s hidden secrets. Drawn together by their similarly shameful curses, the two are reluctantly teamed up. This marks the beginning of what is called the worst (and eventually the strongest) exorcist duo in history.

Their first proper job involves a strange entity known as the Breast Avoider, a ghost that attacks women by targeting their chests. In the course of the investigation, they discover that the monster is actually Mutsumi Nagumo, a busty classmate who deeply despises her own large breasts. Haruhisa and Misaki, joined by their perverted classmate Aoi Karasuma, manage to resolve the case by forcing the spirit to reach a climax, which exorcises it. Afterward, the trio sets up a Spirit Disaster Consultation Room at Shinonome High School to handle similar incidents. Over time, they encounter a variety of threats, including a ghost that manifests inside an erotic game and a series of events connected to fragments of a succubus king’s power.

The narrative escalates as a larger conspiracy emerges involving the resurrection of the Succubus King. Haruhisa and his allies—which include exorcists from Japan and Europe, as well as divine and demonic factions—launch an all-out assault on the enemy’s stronghold. One of their companions, Mihoto, harbors a personal vendetta against the succubus parts and confronts her buried memories during the final battle. The story culminates in a climactic showdown where the fate of the world hangs in the balance, and Haruhisa’s embarrassing ability proves unexpectedly decisive. Throughout the series, the team’s unconventional methods and the constant threat of social disgrace combine with increasingly bawdy supernatural encounters, leading to a final resolution that brings the long‑running exorcist saga to a close.