Bakku ga daisuki! (1981)

One of the girls has short dark hair with bangs and a tight, slim body — she ends up tied to the fridge early on, hands stretched above her head while the long-haired girl straddles the guy on the couch. The long-haired one switches from kissing the guy to riding him hard in the living room, bouncing up and down with her tits swinging free. Later, they take turns sucking him off, both going deep without gagging — the short-haired girl swallows a thick load right after taking it in the ass doggy style. Camera stays close during creampie, you see every spurt land on her back and ass. There’s some light roleplay, teasing, and real-looking chemistry between the girls — not just going through the motions. The entire thing feels low-lit and casual, like a real hookup filmed in an apartment someone actually lives in.