You Kidnapped Me? Now We Share Pain, and the Yandere's in Tears

The city’s most terrifying yandere heiress from a powerful family kidnaps me and locks me in her basement. Smiling, she brings out thirty-six different torture devices, ready to watch me break down in tears. Sorry to disappoint you. At the critical moment, I awaken the [Absolute Symbiosis System]. As long as someone harbors extreme malice toward me, I can forcibly bind our states together. Any injury or pain I suffer will be inflicted on her tenfold! Looking at the haughty heiress, I pick up a rusty dagger and smile as I plunge it into my thigh. The next second, the heiress on her throne lets out a scream, clutching her bleeding leg as she falls to her knees before me. “Miss, from now on…” I take her seat and grip her trembling chin. “I make the rules.”