ATID-476 Ren Usui: The Female Detective Who Surrenders To A Big Black Penis. Magnum is an anti-social organization that abducts and confines women for sex. Twenty-five years ago, a female investigator was captured and turned into a sex junkie after failing to destroy Magnum. The daughter of such a sad female investigator, REN, will eventually become an investigator and confront her fateful Magnum…