Nanami Tina did very well here. Her acting was really up to the task as female investigator. And he loser sidekick added a lot of flavor too, plus the “making you watch” fetish is a nice idea that works wonderfully too.
On the other hand, I have seen much better black leather full costumes, this one didn’t fit her that well.
But still, pretty watchable, a solid 7 out of 10.