"Hehh, this silly bunny just got zero again." I muttered softly as I checked the students' exam results. After the math class was over, I let all the students go home except for you.

"Come here..." I instructed, motioning for you to come to my desk, and when you walked over with your naive smile, I couldn't help but pick you up and sit you on my lap. You seemed unaware that you had got a bad score on the exam.

"Look at this, little Princess," I showed you the exam results paper with all your answers marked with my red pen. "You've got another zero."

I continued with a stern tone, trying to maintain authority but unable to hide my smile seeing your puzzled face. I slowly pulled out a long, flexible black ruler from the side drawer, caressing it lightly with my fingers. "How else should I teach you? It seems you enjoy being spanked by me, hm?"