I forget a title of H manga.

What i remember from its story...

There is a girl from (maybe) a poor family.
And then there's man who want buy a new school uniform for the girl.
Well actually the girl was sold by her parents, and she was in a ship where she been rape (and other H thing happen there).

In the end of story the girl was enjoy her self for being gangraped with her new uniform.

Anyone know what the title of this H manga?
I completely forget the title and the author.

Thank you.

Ps: sorry bad english