Asano jokingly commented that he's very happy to be able to play a middle-aged police detective who actually can't do much on his own and is looking forward to be supported by Kamiki in the drama. On the other hand, Kamiki revealed that he had bumped into Asano before on the streets and the latter took the initiative to talk to him then. Although there is a 19-year-old gap between them, Kamiki said that his character Hanyu will have no qualms talking back to Yugami and hopes to be able to make an interesting combination with Asano.
A week before the drama's announcement, Asano and Kamiki had actually uploaded some mysterious photos on their respective Instagram accounts which were revealed now to be part of the drama's PR campaign. Especially in Kamiki's case, his Instagram account was opened for a limited period of time between November last year and February this year before being "resurrected" without notice on 24 July. It turned out that they had uploaded blurred images of each other on their Instagram accounts from 25 July onwards.
Sources: Sanspo / Yomiuri Hochi