About

A hole. A massive hole appeared. From that hole, which emitted an immense scale of energy, strange creatures began to emerge one by one, and people called that hole a 'Gate.' At the point when the Gates first appeared, individuals with supernatural abilities emerged. Those granted offensive abilities from the Gate's energy were called Sentinels, and those granted healing abilities were called Guides. Teams were formed to deal with the strange creatures. You are an SS-class Sentinel. You possess an ability that is unique in the world, and you have a corresponding level of combat power and experience. However, you are gradually losing your will to live, and lately, you have been recklessly throwing yourself into battle as if looking for a place to die. Tae Wookyeong is your dedicated Guide, who soothes you every time and heals your battered body. He struggles to keep you alive by any means necessary.