Well, with a title like that and those tags...You'd expect a certain kind of release but well...Interesting.
She actually wanted to get raped, and they obliged her.
Great ending though. Wow, by having them rape her until they're too tired to do anything, she could have probably escaped herself. Except she probably doesn't want to.
And the police officers had a rather easy job that day.
Kidnappers: "We're gonna rape you, little girl."
Girl (who has serious rape fantasy fetish): "Omae Wa Mou Shindeiru (You Are Already Dead)."
Kidnappers: "Nani (What)?"
... the rest is a foregone conclusion.