I Became a Monster to Fight Ghosts

When Jiang Chen's beautiful neighbor is haunted by a ghost knocking at her door in the dead of night, he awakens the Demonization System. Driven by his helpful nature, he engages in a friendly yet profound exchange with the Female Ghost before tossing her from the twelfth floor. From that moment, Jiang Chen embarks on an irreversible path to gain power. Transforming into a renowned quack doctor, he heals ghostly patients. Immersing himself in teaching, he educates ghostly students. As the terrifying Forbidden Ruins descend and sinister deities rise, plunging the world into darkness, Jiang Chen, now a formidable demon, emerges to suppress all chaos under a blood-red sky! — Description from novelcodex.orgFull novel: I Became a Monster to Fight Ghosts — read the rest free on N​o⁠v​e⁠l​C⁠o​d⁠e​x⁠.​o⁠r​g⁠