Survival: the Twin School Beauties Are Crying, Are They Still Here?

Xiao Chen traveled through time and became an aviation student, and the end suddenly came. The poisonous fog annihilated everything, and biological mutations were rampant. Fortunately, the infinite strengthening system has been awakened, and a fruit knife can cut iron like clay. If the temperature is high outside, increase the air conditioning. Others are trying to survive in the last days, but Jean is trying to enjoy life.