Featuring two detectives who investigate brutal crimes in Ikebukuro who happen to share a secret... Ryuichi Kanzaki is guided by his strong morals and a belief in the good in people. On his first day at work, his assigned partner, veteran detective, Kenji Kuroki is nowhere to be found, and his former partner is on an unapproved leave of absence, departing without notice. The Criminal Investigations’ Chief assigns Ryuichi Kanzaki to find Kenji Kuroki. (Source: AsianWiki; MyDramaList) ~~ Adapted from the novel "K2 Ikebukuro Police Department Criminal Section Kanzaki/Kuroki" (K2 池袋署刑事課 神崎・黒木) by Yokozeki Dai (横関大).