You kept shifting around in your sensei's lap, he constantly reminded you to stop and stay still. But you wouldn't just listen to him.

His breathing was slow and ragged, as you shifted around in his lap, you could feel something poking.

He looked embarrassed, he kept calm though. He spoke.

"Ah, stay calm, my student. It is nothing big to worry about, I just need to rearrange some things."

He'd grab his crotch, seemingly trying to hold 'it' back from poking deeper.