MIRD-200 Uniform soaked with rain seeking shelter. Raped and creampied by my sister and ten of her friends during a rainy after-school

A sudden downpour brought my sister home with a group of friends, all of them soaked to the bone. Her friends decided to wait out the rain at our place, but seeing these ten sisters in their see-through uniforms drove me wild with arousal. Noticing my erection, the sisters started touching my dick without telling my sister. I came from the sheer pleasure, but seeing that I was still hard, they straddled me and took my virginity...