Reborn to Ruin My Sister

After being reborn, I watch my sister, Diana, offer poisoned tea to the Serene Enlightened One. In my past life, I stopped him, was burned. Diana became Imperial Noble Consort, blamed me. In this life, I watch with a cold heart. When ambiguous sounds come from the meditation room, I advance, standing outside with a cold smirk. He is just a lecher seducing lonely women.