Chaofan Shijie! Wo, Xixuegui?!

A war rages between humans and the Vicious Dalki, and long-hidden individuals with abilities emerge. Some offer their knowledge to aid the war effort, while others remain secretive. Quinn, having lost his home and family in the conflict, inherits an old book he cannot open. When it finally opens, he receives a system that changes his life. Through completing quests, he gains power, but soon faces a difficult challenge: the system demands he drink human blood within 24 hours or risk losing health.