Love in Hell

K was an incel (involuntary celibate) who wanted a girlfriend and eventually dabbled in black magic which caused him to commit an irrevocable sin, and be sentenced to hell for it. The catch: It was all an illusion, but he thought it was real, and he shot himself for it. He suffered in hell and eventually was reborn as the heir to the Demon Lord he summoned when he was alive. Struggling to survive in the new world where suffering and torment was commonplace, he found love in the form of a succubus who lost her powers and he had to help her get them back. He began his journey to fight for justice, in hell, where only evil reigned.