The story began very slowly and boring me a lot, but the tension increases with time and finally reaches its peak in the last episode. The story writer is quite successful in building tension but still with a standard recipe for a criminal mystery story where the least suspicious character actually becomes the main actor. The most disturbing thing is the presence of strange characters who are deliberately presented to obscure the audience's judgment such as Mikiha Ono and Go Sano. In general, this drama is quite good, I give 8 point on this drama