My Brother Is Back from the World of Immortality!

[Urban legend + emotional story + unexpected adventure + micro-horror plot + crossover + male lead] My brother who has been missing for 16 years has returned and is actually a master cultivator who has lived for more than 300 years! He is a man of great ability, but he is a loser when he returns from across the world. The only cute pet that can bring the two of them back to life is the aloof Yu Jie. In a peaceful life, medical research and development that is supposed to benefit the people is advancing in an uncontrollable direction. Since this is my first time writing a book, I have retained many ideas and slowly developed them there. If there are better ones, I will change them. But I really wanted to try to write about brothers turning against each other, because that was the original intention, and there were some foreshadowings in the front. But it's rare to write a good protagonist badly, so I'm still thinking carefully about it.