Beastburn

Cha Hyeon-seong, a boy who lived a painful life, is killed by unknown beasts one day. However, what he saw before his eyes was himself, who had been resurrected and awakened from his death, and Son Ga-yeong, a girl who hunts beasts. In the battle between beasts and humans, Hyeonseong starts a desperate struggle for survival.

(Source: Naver, translated)