Both are mystery crime dramas where the lines and the roles between victims, investigators and assaillant/criminals are quite interchangeable and were quite blurred. Both dramas are very intriguing due to the fact you can never quite pinpoint who was it acting as an investigator, who were the victims and who were the true criminals as the truth ended up not being as straightforward as one had initially assumed. Also both dramas had Hirosue Ryoko playing as a victim character who ended up entangled in the many conspiracies in the dramas.
Both revolve around an old case the main character trying desperately to solve, have many flashbacks about the characters when they were kids, corruption within police, tragedy and Hirosue Ryoko.
They are similar in that they have one case going through the show, but despite that both are very capturing, you won't be able to stop watching it until the end, and you just wouldn't believe how exciting it gets the more you go into the story line. Both are very well made with excellent cast+plot.
