SS-DMM - 「ナマで入っちゃった！」オイル素股でチ○ポをマ○コに擦りつけてたら、気持ち良すぎて生挿入！中出しセックスまでヤッちゃった風俗嬢たち

You can only see actual penetration with Marina Matsumoto. You can't even confirm insertion for the others! There's so much of this in AVs these days.

The premise is that they start with thigh sex, the woman gets too aroused, and they end up having unprotected sex. Yuna Shiina, Erika Takashita, and Kaede Niiyama are incredibly erotic and great. I would have given it 4 stars or more, but the Marina Matsumoto and Natsuko Kayama parts ruined it. Was it just filler to pad the runtime? Such a waste.