Gaming Stream of the Genius is a Manga/Manhwa/Manhua in english language, Games 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

Lee Do-Hyun decides to live together with his older sister in Seoul in order to re-enroll in college. But his once exemplary sister now turned into an unfilial daughter who became obsessed with streaming games. Eventually, Do-Hyun is forced to play his first game ever due to his sister’s need for entertainment and donations for her gaming streams. But Do-Hyun reveals his incredible prowess that no one knew about. A gaming stream with a divinely talented brother and a devilishly greedy sister begins!