Tired of ceaseless war destroying humans, spirits, and demons alike, the Demon King of Tyranny, Anos Voldigoad, reincarnates to restore peace. Two thousand years have passed…but who could have known that his descendants’ complacency would cause magic to regress so much? After receiving an invitation to the illustrious Demon King Academy, a school tasked with locating the reincarnated founding ancestor, Anos resolves to enroll, only to discover that his magic is off the charts—literally! With power too great to be measured, the former Demon King is branded a misfit. How will he convince demonkind that the school’s founder stands before them? Thus begins a misfit’s climb to the top of the demon hierarchy! *Source: J-Novel Club, Vol. 1*

It was the year 526. The world knew that witches existed, and that they practiced the notorious art of sorcery. Nevertheless, the world did not know anything about the study of magic. Our story follows a half-man, half-beast mercenary; humans mockingly call his kind the "fallen beasts." He always dreamt of becoming a human, but one day, he met a witch who would change his life forever. "Do you desire a human form? Then be my escort, mercenary!" The witch introduced herself as "Zero," and explained that she was searching for a one-of-a-kind magical tome that bandits had stolen from her lair. Entitled "The Book of Zero," the grimoire supposedly contained valuable magical knowledge that could be used to effortlessly bring the world to its knees. Thus, in order to realize his dream of becoming a human, the mercenary must accompany Zero on her journey—despite her being one of the witches he so loathed. This is the story of a haughty sorceress and a kindhearted beast. (Source: Nanodesu)

A side story detailing the events of a blank one year period before Japan arc, told from Djibril's point of view.

Our hero Ryouta Arata is an otaku who's just lost his job after the dissolution of his company. Unwilling to return to his old NEET ways, he applies online to a private military security company, thinking the benefits to be promising. After what appears to be a baffling test, he's assigned to be an "operator of operators" and begins his training in a foreign country. Little does he know, the life of a private mercenary is far more grueling than he could have ever imagined! (Source: J-Novel Club)

Arata, a former NEET, wages war against the China's People's Liberation Army with 30,000 young soldiers at Camp Hakim in the interior of Myanmar. One day, he receives a strange request. The client, Nitta, is a female general of the People's Liberation Army. She suggests that Arata leave the jungle and travel to North Korea, a country that continues to be isolated internationally, to provide support for that country's regime. Arata begins construction work to cut through the jungle, calling it a trial, but Omar and his men are upset by the possibility of Arata's departure....... Will the unit collapse? The stage is set from the jungle to the Far East. The blood of the Nitta family leads Arata to the next battlefield. The hit series by Yuri Shibamura and Yoshinori Shizuma has been rebooted! (Source: Kodansha, translated)

One day, a hardcore completionist of the incredibly complex, multi-ending RPG Ronzorkia finds himself reincarnated into the game's world. Worse yet, he has been reborn as Hollow von Heisenberg... a lazy, arrogant villain fated to die in absolutely every route. "If I don't change things, the game's 'scenario' is going to murder me...!" There is only one way to survive. He must weaponize the exhaustive game knowledge from his past life, completely master Hollow's unique magic, and become the most overpowered existence in this world. His first step? It's becoming the apprentice of his master swordsman butler...