My Teacher-Girlfriend is a Manga/Manhwa/Manhua in english language, Comedy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Can sensei be the heroine? Please? Due to a traumatic experience, I have a distrust of people called “sensei.” I, Saiki Makoto, was called by after school by the most popular and beautiful teacher at my school, Fujiki Maka-sensei. “I… love you” Eh– a confession out of the blue!? “Until you say you love me, I will continue to pursue you.” Ever since then, I’ve been called by for “guidance counselling” after school, somehow watched AV together, being given excessive skin-ship, went on dates together. Over time, I gradually became conscious of Sensei…? But isn’t it bad for Sensei to go out with her student? A romance that is absolutely NG, the forbidden love between us two. Lesson start!