Investing In Crippled Heroine and Villainess Makes Me Stronger

Cassian was the disinherited bastard written to die as a villain. Seraphina was the paralyzed Heroine. Isolde was the blinded Villainess. Thrown together by a cruel marriage, all three were meant to be destroyed by the story. Then the Wife Investment System awakened. Every time Cassian protects them, the System rewards him with real power. Every time he refuses to abandon them, their broken bodies begin to heal. The Heroine rises. The Villainess becomes terrifying. And the villain the world discarded becomes something no one expected. His family, the Hero-Prince, the Church, and the invisible force behind the world's story will use the “Plot Correction” force to force the original ending back. Cassian’s answer is simple: “You wrote me to destroy them. Watch me save them instead.” — Description from novelcodex.org