Return of The Bachelor is a Manga/Manhwa/Manhua in (English/Raw) language, Manhwa 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

Bachelor Ma Hyun, after being missing for 10 years, he returned to society as a powerful master! While being a teacher, he's also trying to purge the evil organization named Heukcheonbyeol. And thus, his life as Joongwon's strongest teacher unfolds now!