Ash's manga / #Reincarnation(7)

Relationship between a master and a young disciple! Cold, secluded Master vs. Blackened, Crazy Disciple! Mu Qingyi died to rescue the world, only to be reborn 10 years later to discover that his well-behaved disciple had become the number one wicked leader! “Yanli, respect me, I'm your master!” “I want to undergo dual cultivation with you since you are my master.”

The protagonist got adopted into the villain’s house as he is an illegitimate son, so he’s the villain’s half brother. The supposed to be villain is not the real villain because the person inside is different, he got transmigrated/reincarnated into the villain’s body and has a role given by the system to bully/abuse the protagonist based on the story. The villain needs to follow the story’s line to go back to his world before his accident. However, the supposed to be story line is deviating from the original story. The protagonist should be interested to the heroine but he’s interested to the villain instead.