Episode 04

The Mad Dog (狂犬 Kyōken) is the fourth episode of the Dead Mount Death Play anime.

Official Blurb
Polka's recent activities have caught the eye of a police unit dedicated to hunting down the most bizarre and seemingly superhuman offenders. To a peace-seeking necromancer, these cops could be worse trouble than the criminals he's fallen in with!

Synopsis
Standing in front of a whiteboard, Tsubaki Iwanome shows to the other members of Comps-3 various Troublemakers: The Gator Sisters, The Barber, Riddle Riddle, The Grocer, The Poisoner, Donner Donner, and Phantom Solitaire. All of them are Troublemakers who are either incarcerated or dead. He explains how cracking unbelievable cases such as these, which cannot be made public, is their job at Comps-3. He then gestures to the three Troublemakers who are still at large: The Grim Reaper, Fire-breathing Bug, and Lemmings. He surmises that Fire-breathing Bug may be responsible for the fire at the Shakuzawa Building as Saki Aikawa explains how Lemmings' footprints were found at the scene of the knotted-up humans from the day before. Iwanome says that, even though these cases seem supernatural in nature, the perpetrators so far have always been humans: even the Phantom Solitaire is simply an incredibly skilled human. And since they are human, Comps-3 can handle and catch them.

At the same time, Corpse God is transferring the soul of the real Polka Shinoyama from Takumi Kuruya's drone to a stuffed shark toy. Takumi enthusiastically welcomes his drone back home, while Corpse God tells the real Polka that he will be borrowing his name and identity a little longer, apologizing. Misaki Sakimiya enters the room, excitedly inquiring about the cute shark toy, not knowing she is hugging the real Polka. Takumi says that the real Polka might be a weirdo too, as he is getting excited by the girl who killed him. Polka attempts to retort, but cannot speak. Corpse God explains how he could allow Polka to talk, but it would require a fresh pair of human vocal cords, as creating some from scratch would take too much mana. He then says that before worrying about their monetary situation, he should focus on replenishing his magic, and that exorcising ghosts would be an efficient way to do so. He proceeds to explain a different way of restoring his magic: mana stones, alias regular gemstones in this world. Takumi tells him to face reality; gemstones are expensive.

Corpse God and Misaki visit a jewelry store and Corpse God quickly becomes disheartened from seeing the high prices, saying how easy it was to get one's hands on these gems back in his world. Thanking the store clerk, they both exit the jewelry store, but end up running into Kōzaburō Arase. Locking onto Takumi's drone, the detective runs past Corpse God and Misaki and performs a very high jump, effortlessly snatching the drone out of the air and asking Takumi why he is attempting to run away.

Meanwhile, Tsubaki Iwanome enters Youtoukorou, saying the he is glad he was able to catch Clarissa this time and that he would like a chat with her. He proceeds to ask Lisa about her involvement with the Shakuzawa fire and the tangled humans from yesterday.

Arase apologizes to Corpse God and Misaki for startling them and tells them to please ignore him. While he tries to get Takumi to speak, Corpse God interrupts him, saying that that drone belongs to his friend. Arase tells him that being friends with someone like Takumi is no good, and that Corpse God should cut ties with him immediately. Refusing to ignore his friend being badmouthed, he tells the detective that only he decides who he is friends with, snatching the drone out of Arase's hand without the latter noticing. Having his curiosity piqued now, Arase insists that the boy tell him about himself. A flashback plays out with Takumi explaining his previous experience with Arase, how the detective single-handedly wiped out the gang that Takumi previously belonged to, and that he is scary.

Adapted From

 * Chapter 6
 * Chapter 7
 * Chapter 8

Changes

 * The kick that Misaki Sakimiya gives Kōzaburō Arase is slightly different compared to the manga.
 * The photographs of several Shinjuku troublemakers are anime-original and, therefore, the first time several of the troublemakers have been visually depicted.

Trivia

 * Ryouma Kannagi is the model featured on the National Traffic Safety Campaign posters inside the Shinjuku Police Station.
 * Nishida is visible at the 17:58 timestamp.
 * Aikawa chose Arase's animal profile picture.