I Used My Secret Identities to Crush the Dragon-Slaying Protagonist

Shen Linji transmigrated into a book as the cannon-fodder master who was about to be face-slapped by the arrogant male lead, and was chosen by the Heavenly Dao to save the world. The Heavenly Dao said, "The male lead flies into a rage and wants to destroy the world. Only you can change his heart and save this realm." The right way to handle an overpowered male lead from a wish-fulfillment novel is to give him a master who has transmigrated into a book. Shen Linji said, "No problem." Shen Linji split off seven incarnations to teach the male lead, then pinned the world-destroying troublemaker beneath mountains of books and oceans of study, grinning wickedly. Destroy the world? Seems like the male lead needs more homework. The Heavenly Dao: "???" Theme: A teacher imparts the Way, teaches knowledge, and answers questions.