After Transforming into Master Qing Leng, Something Is Wrong with His Apprentice!

[Double strong + dual male protagonists + the master who is cold on the outside but rotten on the inside × the vengeful and dank puppy apprentice. Yu Yannian, who stayed up late to study high math, opened his eyes and transformed into a cold master in the world of immortality. The system only gave him one task: take good care of the male protagonist's apprentice Jiang Ningtang. After completing it, he can go home. On the surface, he is cold and dignified, but in reality, he only wants to finish his job and leave. At first, Jiang Ningtang was well-behaved and sensible, relying on him in every possible way and serving his master comfortably. But from that day on, the little apprentice completely changed. He was clingy and paranoid, possessive to a frightening degree, and looked at him with sinister and hot eyes. He wanted to kill anyone who came near his master. Yu Yannian collapsed: I just want to go home and don't want to cause trouble! Until a life-and-death crisis, Jiang Ningtang held him tightly in her arms, her eyes red and she growled in a low voice: "Master, don't even think about leaving." Yu Yannian was shocked to realize that he had never been a mission NPC, but this wet and crazy revenge puppy in front of him had set up a dragnet from the beginning, just to lock him away forever.