Because of a mistake in the summoning process, 30-year-old social animal Liu Yinuo was accidentally summoned into the game world. In order to return to reality as soon as possible, Liu Yinuo began to assist the 18-year-old "brave" Tian Enya to save the world. With his excellent cognition, Yinuo, who was originally a high-player, was like a duck to water in another world. Enya also grew from a wayward little girl to a mature and reliable big girl.

For ages, humanity flourished through the power of magic, a gift from witches to aid mankind. But times have changed. The scientific Gear Expansion has made both magic and witches obsolete. In order to liberate humanity from the blight of magic, the mighty Redia Empire began a ruthless hunt to exterminate all witches. Adonis was only a boy when the hunt began, apprentice to a witch he dearly loved. When she perishes at the hands of the empire, Adonis vows revenge. By this furious wizard's power, blood will flow!

Shun Tokinoya is a second-year high school student who lives with his mother and younger sister. After his father was killed in an accident and his sister was injured, he quit the game he loved and now works at an esports café called "FOX ONE." He spends all of his time studying and working part-time, while also socializing with his childhood gaming buddies. Suddenly, he discovers that "FOX ONE" is deeply in debt. Shun and his friends hope to win the "Xaxerion Championship" and the prize money in order to repay their debts. Shun returns to the world of online games, where he is confronted by Bakuretsu-kun, who used to play the game with him.

The world is on the brink of destruction after a devastating ten-year war in the "shadow labyrinth." Desir Arman is one of the last skilled magicians left standing, but even he is no match for the formidable foe threatening humanity's very existence. Just when he's certain the end has come, he is sent back in time to his early days of studying magic at the prestigious Hebrion Academy! With this rare second chance, Desir is determined to save not only himself but also the friends and comrades he once lost. Armed with the knowledge of what their future holds, can his efforts make a difference, or are they all doomed to relive the same terrible destiny?