Mnemosyne

RIN ~Daughters of Mnemosyne~ (Mnemosyne -ムネモシュネの娘たち- Mnemosyne: Munemoshune no Musumetachi, lit. Mnemosyne: Daughters of Mnemosyne) is a six-episode Japanese anime television series produced by Xebec and Genco, featuring grotesque and erotic visuals. The anime was produced to commemorate the tenth anniversary of the AT-X network, which it originally aired on. Funimation Entertainment licensed the series in North America. The plot, rich in the mix of murder and action, is set in modern and near-future Tokyo, and revolves around Rin Asougi, an immortal female private investigator. A light novel and a manga adaptation have also been published.

Plot
Rin Asougi runs a private investigation agency in Tokyo's Shinjuku district, performing odd jobs ranging from finding lost pets to hunting rare stamps in order to get by. Yet despite attempts at a normal life, she finds herself constantly hindered by the strange cases that come her way, figures from her dark past, and her inability to die.