Battle for Earth Defense and Space Invasion

A protagonist named Lu Bu met his friend Jin Lunfa. In the overhead area of ​​the United States, he started a journey from one person to saving all mankind. The enemies in the earth defense battle are all alien creatures. Human weapons are firearms. Each enemy has a unique mechanism to defeat monsters and drop them. Materials are dropped based on luck. Weapons are divided into grades. Some weapons need to be unlocked with money. Even if they are dropped by monsters, the protagonist does not have any golden fingers, and the same goes for the protagonist group. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.