Black Mama, White Mama (1973)

Two petite Asian girls with straight black hair are the stars here. One is seated on a counter, the other on a barstool, both wearing lingerie. They pose in a dimly lit bar before things heat up. The action moves outdoors, where they get naked on a bed. The guys join in, and it turns into a threesome. The camera gets nice and close, so you see everything clearly. The outdoor setup looks fake, but the action is real.