I Run the Last Dorm on Earth

When the apocalypse turns the university into a zombie nightmare, Carson Langster, an ordinary education major, is left betrayed by his ex, Linda Larrow, and his wealthy so-called friend George Tarren. Near death, his roommates sacrifice themselves to drag him to safety, only to rise as the monsters they became. Haunted by their last faces, Carson awakens the Dorm Manager System: a brutal toolkit that lets him command the undead and build fortified bases. He converts the battered dorm into his headquarters, reins in zombified Finn, John Nestle, Rowan and the others, and creates a self-sufficient survival complex with a cafeteria, livestock and factories. Driven by guilt and fierce loyalty, Carson's single mission is to collect cores, upgrade the system, and turn his friends back into humans.