Gray Oreum

In a world on the brink of extinction due to an alien invasion, Han Oreum, who continues her life as a soldier while raising her daughter Goo Cho-rok alone, is attacked by a strange creature during a civilian rescue operation. She hurriedly evacuated her daughter and tge survivors and fought the monstrous creature, but what was waiting for her after coming back alive is the corpse of her brutally murdered child.

(Source: Naver, translated)