High School Taoist is a Manga/Manhwa/Manhua in (English/Raw) language, Demons 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

A Chinese Taoist monk, He Xun, has his soul reincarnated into the body of a Japanese high school boy. He Xun, now Tanaka Mamoru, uses his cultivation powers to ward off demons. Among his encounters, a Demon Fox known as Miyazawa Momoko, suffers a humiliating defeat at his hand. Determined to get back at him, Miyazawa transforms into a school girl, and attends classes with Tanaka in an attempt to seduce him.