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Based on a series of light novels, Isekai Mahou wa Okuretru follows a young magician named Felmenia Stingray who happens upon a young man who had been imprisoned for refusing to help the Hero defeat the demon king after being summoned (mostly accidentally) into the strange world.
Suimei and two of his best friends find themselves mysteriously summoned to another world. There’s a cute princess, magic galore, a Demon Lord that needs to be defeated, and a world that needs to be saved—the works! Too bad Suimei isn’t interested. His friends are all too ready to play the parts of heroes, but Suimei just wants to get home. He has an advantage as a magician... but he’s in for a rude awakening when he finds out what actually passes for magic in these parts.
Felmenia Stingray was a genius magician. She quickly became the most distinguished magician of the Astel Kingdom after her discovery of white fire magic, which had the power to burn anything. However, the world is in peril due to the Demon King. The kingdom's court magicians perform a summoning ritual for heroes and bring forth a hero and two youths, a boy and a girl. Unlike the girl, the young man refused to fight the Demon King alongside the Hero and demanded to be sent back to his world. The kingdom, angry with his behavior, lock him away. Now Felmenia stands before the young man with her strongest magic, the white flame, being completely useless and asks who he is. It was already obvious to her that this man was far stronger than she was. To this he simply responds. "Yakagi Suimei, a magician." Original Japanese Web Novel
Suimei and two of his best friends find themselves mysteriously summoned to another world. There’s a cute princess, magic galore, a Demon Lord that needs to be defeated, and a world that needs to be saved—the works! Too bad Suimei isn’t interested. His friends are all too ready to play the parts of heroes, but Suimei just wants to get home. He has an advantage as a magician... but he’s in for a rude awakening when he finds out what actually passes for magic in these parts.