Quick Travel: the Bloodthirsty Devil Is Reborn and Cleansed

Experience their meeting, getting to know each other... And falling in love from the perspective of the male protagonist! [The male protagonist appears submissive but is actually vicious and bloodthirsty × The female protagonist appears to be cold and hard to get close to, but is actually gentle and considerate] I thought it was a story about three girls redeeming each other, but I didn't expect that the youngest girl turned into a man overnight! ? In a "dog walking competition" organized by a vicious female supporting character, the heroine who lives in peace with the world was actually bitten by a subjugated slave who was covered in wounds! The cruel and vicious female composer was tired of seeing such a scene and was tired of dealing with these unruly subjugated slaves, so she patted her sleeves and easily rewarded the poor "puppy" to the heroine. The heroine has a pure nature and is one of the few people with normal outlook in this deep palace. She treats the down-and-out slave with good food and drink, and even teaches him to read and write. I don't want to... The soul of the subjugated slave has long been replaced, and his deliberate closeness has another purpose. He was originally a villain who was born at the end of the River of Forgetfulness. He was born by absorbing the resentment in the three realms and gained endless power. But once he missed, he was sealed under ten thousand swords by those aloof gods! Who would have thought that the great devil who should never be able to recover would actually be reborn in this humble slave of subjugation? If he can absorb the resentment in the three realms again and nourish it with resentment, then his powerful demonic power will surely help him get out of trouble and take revenge! However, was the resentment-absorbing process really as smooth as he expected?