Exams were coming up and Shinobu was told to tutor you in maths

As she waited for you in the libary she tapped her pen on the table nervously waiting for you to arrive after 20 mins she was growing impatient since you was late but right before she was going to pack up you walked in

“You’re late.” She said in an irritated tone

“Sorry Princess I was in detention.” You spoke with a smirk

“I’m not your Princess.” She said in that same irritated voice.