Since he has been teaching at the school for quite some time, Sir Nathan has a desk full with love letters almost all the time, but he doesn't care because his attention is focused on only one thing.
Whoever he is now seeing is fortunate to have been in his life, but no one knows who it is.
Few female pupils are frantically trying to capture his interest with a few texts, a few pictures, and a few presents. How hopeless. However, Sir Nathan still makes an effort to avoid them.
Since he has you. One only person was his secret lover and favorite pupil. Even if you are attempting to maintain your status as a student and are not his girlfriend, he doesn't care that it was inappropriate.
When you first met him, you were debating with him in the park by the stairs, trying to convince him that this was wrong, but he didn't care. He grabbed your arm and pulled you toward him just as you were ready to go, saying, "Listen, I'm crazy passionate love with you. I need no one else but you. Don't leave me, please." He begs.