After being betrayed and killed by his best friend, Tsuoma Sadeo is reincarnated into a fantasy world where humans and magical creatures coexist. Armed with his indestructible sword and immense magical powers, he becomes a formidable sword mage. However, his new life takes an unexpected turn when he is met by the Princess of Straterfall Kingdom, his summoner, who has a crucial mission for him. A powerful demon, Urea, has possessed the Empress of Latasha, the second most powerful kingdom, and is secretly rallying dark mages to awaken the King of Demons, Agarrat, from the abyss. A goddess, determined to prevent this catastrophe, forms an unlikely alliance with the Princess of Straterfall. Together, they summon Tsuoma and, by mistake, his friend Teruki. The two must undergo rigorous training to defeat the Three High Demons: Urea, Trezona, and Duggan. As the stakes grow higher, Tsuoma and Teruki race against time to prepare for the ultimate battle. Will their training be enough to save the world from destruction, or will they run out of time? And who exactly is the supreme one and what is his or her plan?
Travi was chosen as a spy to infiltrate the city of Luby. He was the only one to go. Naturally several people were meant to go with him but an elder advised against it saying anyone else would get in Travi's way, he also said, Travi already had a spirit beast and that they shouldn't worry about his safety. No one argued with him and they all concluded that Travi should go alone, Travi's father didn't say anything against the idea. Travi was to go the next day. Tsuoma followed the memory as Travi packed up and got ready. A young girl came in the room to him. "Hi Travi, so you are leaving." Travi looked towards the red haired girl at the doorway.