Rebirth of Revenge in the Apocalypse

In the last life, when the apocalypse came, although Mu Chen was an ordinary person, he did not have a difficult life because his younger brother protected him. But—— In order to get that space, those people actually used his brother for research, causing his brother to die tragically on the experimental table. His brother is only five years old! In his next life, Mu Chen changed the space to himself. In this life, he was weak and decided to use his strength to protect his brother. In this life, he will take revenge and cut those people into pieces! Huh? Isn't that the most powerful person in the previous life? He actually knows his brother? Awen? The name sounds familiar. Mu Chen: "!!!" Isn't Awen the stupid "friend" his brother talks about every day? The "friend" who needs his brother to be taken care of by a senior classmate! Yu Wenjing: "..." Don't I want to lose face? No, I was just playing with your brother! I am very strong! Mu Chen: Explanation, I understand! Reading instructions: There are all the old ones, the bloody ones, the supernatural powers and the space. Concept: Life is hard, but it's beautiful to live together