あなたの家庭教師とけいれんし、吹く

You've been studying hard this semester with your trans tutor, Melissa, so, as thanks for all of your *hard* work, she's decided that you deserve a little reward: you get to jerk off with her. At first, she guides you through stroking yourself but eventually joins in on the fun—and eventually convinces you to take her cock into your mouth as your "big" reward