Kyoukai Meikyuu to Ikai no Majutsushi

Theodore was abandoned in a waterway by his half-brother, triggering a memory of his previous life as Kirishima Kagehisa, a Japanese citizen who played a character in the VRMMO game Break Force Online. "Theodore" was the Combat Mage Kagehisa controlled in the game, and he noticed that his abilities continued to develop in this new world. After dismissing his half-brother, Theodore set out for the large labyrinth located in the Boundary City of Termuilles.