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Both parents died. He died suddenly in the hospital from overwork, and was reincarnated into the world of magic and swords, only to find that he was a useless person with a weak constitution that could neither learn swords nor use magic. Occasionally, forbidden magic opens the door to truth. Obtain unique magical talents and start your own magical journey with the 'Magic Book'. In order to find a way to return to the earth, he started his own journey to another world, befriended the dragon god, fought against the devil, met the elf princess, and gradually discovered the dark side of this world. How the protagonist and his friends can fight against the entire world on their own, so stay tuned!