At the household where I worked as a private tutor, there was a lady who was kind yet strict, sometimes rewarding me with special treats. She guided me in many ways, and especially in nipple training, she introduced me to an entirely new world I'd never known before. I felt deeply grateful to her and cherished her like a beloved pet. This story depicts a role reversal between a seemingly confident tutor and a well-behaved student who is actually a dominant sadist.