Gomi Ika da to Tsuihousareta Shounin, Jitsu wa Zensei Kensha desu 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

Award-winning work of the Isekai Manga Original Novel Contest gets a comic adaptation! The strongest sage dominates! An exhilarating reincarnation story!! One day, Gald, a servant of a count’s household, is falsely accused of a crime he didn’t commit and is told, “You are less than garbage!” Consequently, he is dismissed from his position as a servant. Banished from the count’s house with nowhere to go, Gald decides to take the entrance exam for the magic academy…!?