This was quite alright. This is a prequel to the Death Note series and it deals with the murder mystery case that Naomi Misora and L solve together. This case is mentioned within the series of Death Note so it was actually quite fun to explore Naomi and L's first encounter. 
 I was a little underwhelmed by this but overall the mystery behind the BB murder case made sense and the murderer was an interesting character. I quite like serial killer stories and when the scenes of the murder have something in common so this was a nice bonus.