Anshitsu (1983)

Starts with a slim white teen with long brown hair standing in shallow beach water, her back to the camera. Cuts to an Asian MILF with short black hair in a kitchen, dumping stuff into a trash can. Next, a petite white redhead teen sits on a couch, talking on the phone. Then, a steamy bathroom scene with a mature white woman in a towel, face obscured by smoke. Ends with an office threesome: a black-haired Asian guy at a desk on the phone, while a slim Asian girl with long black hair leans over a chair in the background. Variety of settings and performers, all indoors except the beach opener. Lighting ranges from bright natural to dim, smoky atmospheric.