Kuro Gal Hokeni Jisshuu Chu~!

This time, our dark-skinned gal is "Angie," a nurse intern.
While treating a student with a leg injury, she conducts a medical examination for practice. As she listened to his heartbeat, he gets sexually aroused by the close contact of Angie's big tits. Angie strips off her lab coat and presses her big brown tits into the face of the student, as she begins her hands-on "sex education" with the virgin student...!

(Source: Fanza, translated)