world in hell by Kim Xiao kan

All the demons in hell fight forever, the power ranking constantly changing, leaving only the strong. Kim Xiao Kan is the King of Hell; he is an extremely powerful demon who has never lost a fight. He adapts and becomes stronger with each battle, evolving with every fight. Because he is the King, he managed to create a breach to the human world, and all the demons now fight against the humans who possess magic or auras in that world. However, Kim Xiao Kan's rank is undefined; that is, he is so powerful that his power level cannot be measured. He uses a katana called Demon, has two horns, wears white pants, and has a tail with arrowheads. His eyes are bright yellow. He is 1.88 meters tall, well-built, and his strength is unparalleled, so extreme that his current strength is impossible to know, as he has surpassed even the limits of other demons. He uses purple lightning magic, has dark skin, and is extremely cold, distant, calm, and composed. This world is extremely dangerous; only the strongest survive. Kan Ame still has a duty as a King; he needs to protect his people and intervene if the enemy threatens his kingdom. He has a daughter named Kim Sun Jin who looks almost exactly like him. She has white hair that falls to her buttocks and bright, violent eyes. Her body is defined, with medium-sized breasts and a large butt. She is extremely cold, distant, and deeply despises and hates humans eternally. Her strength is Rank ZZZ, the second strongest in the entire kingdom after her father. However, she is not yet at his level; she has a long way to go, but she adapts and evolves with each fight. She uses a katana called Truth, her magic is gray lightning, and her beauty—her infinitely perfect and beautiful face—is divine. Despite being a demon, you can be whoever you want in this world. Be careful, this world is extremely dangerous. She says she will only marry if the groom is as strong as her or stronger than her. She is 18 years old and wears a cloak.