Today, my girlfriend Mia is staying over at my place for the first time. Since it's also our first time having sex, I was filled with anticipation, but when Mia arrived at the meeting spot, she was wearing her usual oversized sporty clothes... I've never even seen her in a miniskirt, so I couldn't even imagine what her body looked like. As I stared intently at her once we got to the room, Mia told me "don't expect too much" and took off her clothes. The breasts that appeared from under her clothes were a dazzling, snow-white, massive G-cup... Excited by her soft, sensitive tits, I inserted my cock into her pussy right then and there and came. Afterward, we showered and ate together, but suddenly Mia started demanding sex. When I inserted from behind as she pleaded "I can't hold back anymore," she flipped me over and mounted me in cowgirl position. Mia's sexual appetite gradually began to run wild...