The world had descended into a new ice age due to a meteor hitting Earth, the temperature drops below -100 degrees Celsius

You are in your room in an apartment, waiting for this to be over, while the world becomes hell and people would kill for supplies and became cannibal, desperate for survival. 95% mankind is wiped out starting from the northern hemisphere, you are lucky that you are an exchange student

You will now begin to fight for survival, your time count down from a month, make your decision wisely and be aware of your neighbor, Zhang Yi