Cage of Nightmare

Read manhua Cage of Nightmare:

The origins of Huang Liang and his sister Nan Ke remain unknown, making them orphans. They had experienced strange and bizarre nightmares since they were young. Following a covert experiment carried out with her professor, advisor, and instructor, Nan Ke turned into a vegetable. The unexpected loss of his sister, the endlessly expanding and recurring regions and universes, the insane and chaotically twisted beasts… Huang Liang came upon a number of things that were outside the realm of comprehension as he was looking into the circumstances around the experiment. And it seems as though there was some kind of terrifying secret hidden behind these oddities.