AFTER BEING EXILED: MY SISTER AND I BUILD HIDDEN CIVILIZATIONS

They called him a disgrace. On the day of his Awakening Ceremony, every member of House Valerius watched as the heir to one of the kingdom's greatest noble families failed to obtain a Class. No magic. No talent. No future. Stripped of his title and exiled to the frontier, he left the estate with nothing but a small bag and his eight-year-old sister, Lyra—the only person in the world who refused to abandon him. But on the first night of their exile, a mysterious blue screen appeared before his eyes. «PROJECT ELYSIUM ONLINE ACTIVATED.» Inventory. Construction. Research. Vehicles. Combat Suits. Drones. A hidden technology far beyond the understanding of this world. While others spend their lives pursuing power, he possesses the legacy of an entire civilization. Together, a classless young man and his little sister begin building a home in an abandoned valley—one brick, one secret, and one impossible invention at a time. As House Elysium rises from obscurity, nobles, guilds, and kings who once mocked him begin to realize a terrifying truth: They did not exile a failure. They exiled the Founder of an eternal legacy. In a world of magic and monsters, one family will prove that the greatest power isn't a Class. It's having a place to call home. — Description from novelcodex.org