The Earth Is Too Dangerous

The protagonist comes from a distant planet, has slept on the earth for more than nine hundred years, and wakes up in a lifespan alarm. The protagonist only has five years to live. The earth's air and food are chronic poisons to him, eating away at his lifespan all the time. He must use his only lifespan to find a way to extend his life on the current earth and a way to return to his own planet. In the process, I met a lot of people and a lot of things happened. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.