Jin-Ho isn't your average high school student. He has a notoriously stubborn sense of right and wrong, and no interest whatsoever in any of the girls at his school. Enter Ms Hae-Young, Jin-Ho's new homeroom teacher. Armed to the teeth with her own stubborn sense of justice, she's determined to set Jin-Ho straight and turn him into a model student. But of course, things aren't so easy when people think your should be a model rather that a teacher. You're emotionally and mentally stressed due to a runaway father, and the person you're trying to help wants to clash with you every step of the way! Enter the world of Unbalance Unbalance and see how two hard-headed, yet delicate people start a relationship that may either explode or fit just right!
This is manhwa (Korean) rather than manga (Japanese).
By a strange coincidence, I'm reading this just after finishing After the Rain (a story about a young 17-year-old girl who develops a crush on a middle-aged man). This time the affair is between a teacher and her male student.
I have mixed feelings about this. The story is compelling, but not nearly so comforting as After the Rain. I have one more volume to read (which will not finish the story).