BlackSun is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Hunted since birth for a burden he unknowingly carries, Yu must discover the secrets of his origins and his ties to a hidden shinobi world so he can come to realize the weight of his destiny, of being the last hope…the Last Flame of humanity standing against an ancient demonic threat.