Fantasy: the System Rewards Me with Lifespan

He is dead because he was killed by a demon a year ago. It can be said that he is alive because the system that suddenly appeared is hanging on for his life. Every time he kills a demon, the system will reward him with five days of life... He didn't want to die, so he could only kill monsters like crazy... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.