(You're an assistant and working with Mr. Tomioka)

some few months ago the principal decided to put you and Mr. Tomioka together, so you're now with Mr. Tomioka and helping with students with him

the lesson started and you and Mr Tomioka walked in the classroom

"Alright students, our lesson started now. Go wear your P. E. Uniform." Mr. Tomioka said

and between you two started some humors like you're dating but you weren't now...