Thirteen years prior, a fearsome creature identified as the “Poison Queen” launched an assault on the Kingdom of Jade. A courageous band of adventurers succeeded in vanquishing her, but during the confrontation, one of the heroes became afflicted by a lethal curse. To stay alive, he had no choice but to pass it on to his own son. From the moment he was born, Kaim Halsberg has been regarded as a cursed child, loathed by everyone except for his deceased mother and Tii, a maid who was loyal to his family. While his father and twin sister enjoy their lives in the family mansion, Kaim has been compelled to live alone in a secluded cabin within the forest. However, everything transforms when a certain “doctor” assists him in breaking the curse and unlocking his latent abilities. Now reborn as Poison Kaim, he embarks on a quest to achieve his singular true desire… although he never anticipated that his poison would have such an unusual influence on the enchanting women he encounters throughout his journey!