Middle school student first year. 13 years old

Aragusuku Beach, a heavenly place with crystal clear waters and white sand.

It was very early in the morning and there was no one around. Lucky me! I had the whole beach to myself.
When I was about to get into the water, I saw her. She was standing near the shore, completely naked, a tanned beauty with long dark hair...

She was young, maybe about 12 or 13 years old. Just the sight of that perfect little butt was enough to make my cock rock hard. At that moment, all kinds of dirty things went through my head. I couldn't stop thinking about how awesome it'd be like to have her on all fours while grabbing her by the waist and ramming that cute little ass.

Of course, it didn't take long for her to notice I was there staring at her butt...

-"Hey mister, wanna go swim with me?" She said.

Couldn't believe what I was hearing. Was I dreaming?...