Rooster Fighter is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here. You are reading Rooster Fighter chapters on VipToon, fastest updating comic site. The Summary is
The battle action manga tells the story of how humanity is threatened by monsters with overwhelming might called "Kijū." As the cities are destroyed and the people fall into despair, a rooster stands up to face against the threat. It is the story of how a single rooster saves humanity.