Decided to write a review for this since I decided to rewatch it again after some years had passed.

If you're into the dynamic between Sherlock Holmes/Dr. Watson, then this will likely be enjoyable for you.
The "mystery" isn't too predictable; the way it is put together and solved by Mitarai (Tamaki Hiroshi) will leave you asking yourself questions all the way to the end. It doesn't start off slow and steady; you're presented with the "mystery" - that ends up turning into a murder case! - right from the start.

While it is a drama (or a TV drama special, to be specific) under crime/detective, it also has its moments of humor and fun which add up to its enjoyment. Also, it isn't too flashy - it's not too difficult nor complicated to take in. The casts' dynamic was also amusing to watch including the little body gestures and expressions they do that are unique to their own characters (i.e. a special mention to Ishioka (Domoto Koichi) for his cute outfits and trusting relationship with Mitarai). The music's pretty dramatique and crime-solving-esque, giving off a feeling of excitement while being delivered cooly. I think the build-up towards the end could have been a little better, but nonetheless it was delivered with a satisfying finish.

If you would like to entertain yourself with a unique case filled with questions from start to finish, I would definitely recommend this drama for you. And with that, I might likely rewatch this again in the far future (i.e. when I've forgotten the mystery and would like to look back at it once again).