Oop
There’s a sub couple in Fudanshi-kun’s Honey days where it’s the uke’s brother and his teacher. (≧∀≦)
Well in http://www.mangago.zone/read-manga/private_lessons/
The teacher ordered the uke to wear it
http://www.mangago.zone/read-manga/i_m_no_match_for_him/
Not the exact scenario u described but it’s a teacher x student yaoi
A+ recommendation.
Any yaoi manga that have the partner having vibrator while in the school or teacher is teaching and got a blowjob under the table . ٩(๑❛ᴗ❛๑)۶