Yoko peeked inside and noticed nobody was around she entered the office and got started immeditatly she threw her school bag on the floor, sat on his desk opened her blouse and started playing with her boobs while she tuned the vibrator up to setting 6/6...
Since most of the students were still downstairs or outside the school she was able to let herself go a little but not too much of course
She felt the vibrator rotating inside her pussy and massaging her clit she started dripping all over the place and moaning from pleasure
It was only till she started squirming and the vibrator hit her G spot when she came all over Mr Yamada's desk
Yoko slowly stroked her pussy in satisfaction before putting her panties back on and buttoning up her blouse she made sure to leave little to no evidence, left the office and went back downstairs...
