When she was an undergraduate in junior high school, he fell in love with her at first sight.
In high school, they met again. She was his high school teacher and he was a student. He suppressed his feelings for her and protected her secretly.
When he was in college, he returned to his alma mater, but unexpectedly found that she had returned to this school again, and they met again.
Concept: Love is regardless of age, as long as we love each other, we must be together