What I imagine is the storyline from the game (the detective trying to find the killer) was drowned out by the main character pausing the plot every five minutes in order to have sex with nearly every girl that appeared in the anime, despite his mention at the beginning about having never found love again after his lover died.
The story itself is quite interesting, but the detectives method of "finding clues" usually involved inserting a certain part of his body into a woman as payment for information, and these scenes made up around half of the anime.
All in all, this could've been half the length and shown a really good gritty detective story in a short half-hour OVA, but instead decided to turn it into an hour long hentai with hints of detective work dotted between our MC getting his freak on.
