A busty female senior who is out and a virgin junior are alone in a closed room and try out an unexpected first time sex! What's more, there is a special rule that they will be paid 100,000 yen for each creampie in the cowgirl position! The two working adults are confused at first, but they show their sexual desire before the money! The senior girl secretly gets turned on by the junior boy's hard cock! We were able to confirm many cases of first time sex in the cowgirl position! And the virgin's sexual desire is bottomless! We were able to capture a total of 17 creampies from the four couples with the senior girl swinging her hips wildly in the cowgirl position!