Saitou no ha destacado en nada a lo largo de su vida, pero en el nuevo mundo en el que despierta parece que sí es útil para alguien.

En este mundo paralelo, a pesar de lo hábil que es, hay cosas que Saitou no sabe hacer ni arreglar, y no tardará en aprender esta dolorosa verdad.

Saitou empieza a descubrir que el mundo en el que ha aterrizado se asemeja más de lo que él quisiera a su mundo de origen: los mismos problemas sociales, económicos, incluso sentimentales. Aun así, sigue decidido a dejar huella en este mundo paralelo y contribuir a su grupo de aventureros.

Adventurers from all over the kingdom flock to the new area that Saitou discovered. Saitou wants to go and investigate the curiosity that first lead to the discovery. Meanwhile, the king orders his allies to retrieve a hidden treasure from the new area.

Kisurugi and his demon allies swoop down on Saitou and the others once again! Kisurugi has been assassinating the strongest adventurers in order to obtain the hidden treasure of a mage who can control time, but his reasons aren’t what anyone expects.

The dark spirit attacks Saitou and the others with powerful light magic. Even working together, it’s all the skilled adventurers can do to defend themselves. Then Saitou suggests a measure that could turn the seemingly hopeless situation around.

Morlock has magically stopped time, but he's completely forgotten what he's supposed to be doing! However, Saitou has anticipated even that! Then, just as Morlock is about to attack, someone else's memories flood into him.

There is a way to save the witch, Rahvella, from her curse, but will Kisurugi truly be willing to pay the price? And when the method of Saitou’s arrival in this world is discovered, will it change things between him and the others?

When Saitou and the others learn that their friend has died and been buried in the wastelands at the edge of town, they gamble on a slim hope and spring into action. Meanwhile, unbeknownst to them, Morlock has had an unusual spell cast on him.

As Morlock and Saitou talk about Raelza, the demon dog attacks! Raelza and Lafanpan arrive to find their friends at a clear disadvantage. Then, the demon dog’s master, a twin-headed demon with strength on par with a demon king, appears before them.

The double-headed demon has been stuck with magic powerful enough to fell a dragon. In the aftermath, Morlock feels sympathy for the demon dog and says he wants to try to save it. But then, Saitou and the others are struck by a surprise attack!

Saitou and the others have returned to their everyday lives. Then, one day, Lafanpan takes a bath in a mysteriously pattered cup and something completely unexpected happens.