Heavenly Moon is a Manga/Manhwa/Manhua in english language, Martial arts 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

The Murim Warring States period, is where only the strong survives. This is the war slave Cheong Gwang and Myeong-Wol's Murim Survival Story.