City: I, Tiga, Will Defend the Earth at the Beginning!

Chen Nan traveled to a parallel world and spent 23 years peacefully at first. However, this year, the world entered a new chapter, with invasions from all realms and monsters surging. But he awakened the crazy fighting system, and his strength will increase as long as he fights. In this way, he increases his strength while protecting the earth. "Ding! The host defeats the planet-level monster - King Black. The reward is: the strength is improved by a small level. Since this is the first time to obtain the reward, new rewards will be obtained." "Ding! The host has gained a small level of improvement and unlimited energy!" In this way, Chen Nan guarded the earth for five years. Five years later, he was seriously injured in a sneak attack. Facing enemies who surpassed him, he still chose to stand up. "Tch! Is this the patron saint? It's rubbish. We will die because this patron saint is too weak." "Yes, yes, he should protect us. I am the boss of a company with hundreds of millions of dollars. If I die, what will happen to my company?" Note: Heidi, Heidi, Heidi in the later stage! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.