The great master 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

대사형 선유 , The great master manhwa (From the author of Peerless dad) Some children are raised in the hands of Kwak No, After establishing a Disciple-Master relationship, the children dream of their own dreams by practicing martial arts and walking in that path to become masters. In order to make a living, Kwak No always had to leave his seat, and Seon-yu, the eldest of the children, has to take care of the Children, and He’ll be the Great Master.