πI recommend the following good ending underworld novels to you: 1. << Black-bellied Concubine >>: The female protagonist is a mafia heiress who successfully counterattacked and rebuilt the kingdom after transmigrating. 2. " Abandoned Concubine at a High Price ": The underworld queen transmigrated into a weak princess and fell in love with the prince regardless of everything. Later, she was thrown off the cliff by the heartless prince, but she decided to fight back and capture the black-bellied prince step by step. 3. " Mistaken the Evil Prince ": The finale of the three-step dark series. The emotional entanglement between the female protagonist and the prince uncovers a thrilling conspiracy. I hope you like my recommendation.