・Episode 1: "Nana-nin no Keiji no Nichijou!" (The Daily Lives of 7 Detectives) set between episodes 4 and 5

・Episode 2: "Infernal Unfair!" set between episodes 8 and 9

・Episode 3: "Keiji Kariage Yukemuri Satsujin Jikenbo!" (Detective Buzz-Cut: The Case of the Steam Murderer) set after episode 13

[Source: Anime News Network]