Returned from the Mental Hospital and Bloodbathed the Wealthy Family

When Su Wan woke up from despair in the mental hospital, she was no longer the innocent and kind-hearted daughter of a wealthy family. Her heart, tempered by the betrayal and pain of her previous life, turned into a cold blade of revenge, vowing to make those people pay with their blood. Bite! Your revenge system is online, please receive your blackening value gift package! (The system sound has a hint of bewilderment and is alluring)