Kyoukai Meikyuu to Ikai no Majutsushi

After being callously thrown into a waterway by his own half-brother, Theodore experiences a sudden and overwhelming flood of memories from a past life. He realizes he was once Kirishima Kagehisa, an ordinary Japanese citizen who spent his time immersed in the virtual reality MMORPG Break Force Online. More shockingly, he has been reincarnated directly into the body of "Theodore," his personal Combat Mage avatar from the game. As he comes to terms with this bizarre new reality, he discovers that the magical skills and combat proficiencies he cultivated within the digital world are fully functional and progressing remarkably well in this unfamiliar realm. Armed with the abilities of a seasoned player and the instincts of a powerful mage, Theodore refuses to remain a victim of his family's cruelty. He effortlessly brushes aside his treacherous half-brother, choosing instead to forge his own independent path in this strange world. Seeking purpose and adventure, he sets his sights on Termuilles, a sprawling settlement known as the Boundary City. There, a massive and perilous labyrinth awaits those brave enough to explore its depths. With his otherworldly knowledge and growing magical prowess, Theodore steps into the unknown, ready to carve out his destiny as a master sorcerer in a land where the boundaries between worlds blur.