The protagonist realizes he has reincarnated as Vento, a villain character destined to die in every single route of the adult epic game "Fairys of Fantasia", commonly known as FOF. The protagonist struggles against fate to avoid these death routes, but thanks to Vento's innate talents, his new life actually turns out to be surprisingly fulfilling...?

One day, Sylva realized that he reincarnated into a mob soldier from the game that he was hooked on in his previous life. Even though he utilizes his game knowledge to do his utmost best to survive in this dangerous world, he opts to hide his true strength in order not to throw the scenario into disarray. However, an unexpected turn of events led him to easily defeat a powerful demon that even the hero is hard-pressed to defeat. And to make matters worse, he did that in front of his favorite heroine in the game... Upon this incident, word started getting out about his true strength...!

After his company suddenly disappeared overnight, a worn-out corporate slave found himself unemployed — but what he gained was the ultimate skill to dominate monsters, humans, and all things...! In modern-day Tokyo, a mysterious phenomenon known as 'Dungeonization' begins, turning buildings into monster-filled labyrinths.

The series follows a salaryman who is reincarnated into an alternate fantasy world as Rain, after sacrificing himself to save a child. He is saved, however, by two famous beauties who are the most feared across the land. Rain's school life begins even as he already leveling up with the cheat skills of both sword and sorcery.

Rintaro Shido, a high school student who aspires to become a full-time househusband, is in the class with a very popular idol, Rei Otosaki. The two have no connection other than being classmates, but their relationship changes drastically when Rintaro serves Rei a home-cooked meal after she nearly collapses from hunger! The food was so delicious that Rei said, "Can I come here every day to eat?"...?!

Shuu, a student of the Hero Academy whose swordsmanship and magic skills have not developed, is finally advised by the headmaster to drop out! Two beautiful witches suddenly appear before him and tell that he is the chosen one who has inherited the soul of the Demon King and that he needs to cooperate with the witches to unleash its mighty power. Shuu quickly learns how to liberate himself, and for the first time in his life, he is able to use magic and successfully clears the final examinations that will prevent to be expelled from the academy! Shuu then decides to first become a hero with the power of the Demon King as a prerequisite for becoming the Demon King that the witches want...

Aldnoah, the Demon King, takes his own life in front of the heroes and is reborn in the world a thousand years later. In order to see if humans have become strong enough to stand up to the Demon King, Aldnoah, who has grown into a young man, decides to attend the Academy for Heroes...