Durarara!!

Aboard the Advenna Avis in 1711, a group of alchemists summon a demon in the hopes of gaining eternal life. The demon gives them an elixir of immortality and the method of ending their existence by "devouring" one another. Soon after, one among them begins to devour his companions. Realizing the danger posed by staying together, they scatter across the globe.
Centuries later in 1930's America, a certain federal investigator tries his best to combat the rise of organized crime during Prohibition, send a particularly infuriating terrorist to Alcatraz, and catch an outrageous thief duo. Meanwhile, the transcontinental train, the Flying Pussyfoot, begins its trail of blood across the country.
In 2002, a small group of the original Advenna Avis alchemists are on a journey to find the rest of their fellow immortals. However, there is one companion they did not expect to meet again.
Seemingly unrelated events, from a sleepy Italian city in the early 1700's to a modern luxury cruise ship traveling across the Pacific, reveal themselves to be far more connected than anyone could imagine...
(Source: Wikipedia & MAL Rewrite)

In the sequel series to the urban fantasy Durarara!!, Yahiro Mizuchi has come to Tokyo in the hopes of starting a new life (and maybe seeing the Headless Rider), but the famous Dullahan hasn't been seen in half a year-and neither has anyone who's gone to find her!

(Source: Yen Press)

Welcome to Ikebukuro, where Tokyo's wildest characters gather!! Meet an ordinary boy who daydreams about the extraordinary. A naive stalker girl. The strongest man in Ikebukuro. A shut-in doctor with questionable credentials. A hedonistic informant...and the "headless rider" astride a pitch-black motorcycle!? As their paths cross, this eccentric cast weaves a twisted, cracked love story...

(Source: Yen Press)

Ikebukuro, Tokyo—a neighborhood where twisted love prowls!! A series of street slashings in Ikebukuro begins to connect total strangers:
A teenage girl with no personality of her own; a beat writer for a third-rate tabloid; a teacher suspected of harassment; an informant based in Shinjuku…and a headless rider straddling a pitch-black motorcycle!! Meanwhile, the slasher continues to terrorize the night, all in search of…“him”!?
(Source: Yen Press)

The serial slashings in Ikebukuro have come to an end, and Anri is steadily recovering from her injuries. But life is far from "back to normal" for Kida. Enraged at the random violence that has shattered the peace of his neighborhood, Kida and his middle school crew, the Yellow Scarves, reunite to address the rise of organized gangs in town-the Dollars, the followers of Saika, and now the Yellow Scarves. When all is said and done, who will hold the power on the streets of Ikebukuro? 
(Source: Yen Press)

Half a year after the turmoil that rocked the entire city of Ikebukuro.

Peace has once again returned to the city and people are living each day normally. The high school students enjoy their days of youth as the strongest and most dangerous man of Ikebukuro works diligently. The informant plots (or plans) a new scheme and the headless rider is pursued by the cops as she rides through the night... But soon this normal will be cut short by the abnormal. Slowly but surely, the unknown will seize the city and face an all new storm.

(Source: Aniplex USA)

This collection of short stories and vignettes provides nine tales of not-so-ordinary life in Ikebukuro, including some reminiscing at Celty and Shinra's big hot-pot party, the coming-of-age ceremony of the older Raira gang, and another supernatural visitor to Tokyo!

(Source: Yen Press)

Miyoshi Yoshimune (Yoshi-Yoshi) just moved to Ikebukuro because of his parents' work. While exploring his new town with his classmates, Mikado, Anri, and Kida, he hears rumors about "The Headless Rider" and "Color Gangs." While chasing after these rumors, he gets dragged into a conspiracy involving the whole of Ikebukuro...

Adapted from the PSP game of the same name focusing on a new original character.

The characters of Durarara!! have been made small and are going on a rampage in Ikebukuro! Lots of things are happening today on these streets where reality and illusion mix together!

January, Ikebukuro. It's the same as usual; Mikado, Masaomi, and Anri have started their third term at Raira Academy, Simon is handing out flyers for Russia Sushi in the street, and Shizuo is throwing vending machines. At the movie theater on Sunshine 60 Dori, the New Year holiday movie "Bodyguard Case 2: Salaryman Ninja Guy," staring Hanejima Yuuhei and Hijiribe Ruri, is showing. Due to its popularity, more and more people have started to carry attaché cases similar to the one used in the movie. Meanwhile, Celty is busy running around answering requests for delivery of said attaché cases. And then a sandstorm "mist" starts to repeatedly envelope Ikebukuro, making it so that people cannot even see what's in front of them. It is in these sudden, localized "mists" that an opportunistic thief appears, targeting the attaché cases…

Based off of the PSP game of the same name.

Durarara!! spin-off series that takes place after the original, starring Orihara Izaya as the main character.

An man shows up in a town far from Tokyo. All he does is facilitate the flow of information, and nudge people on the back. He is an informant; that is what this man boasts of himself. Whether or not the title is appropriate for what he does, one thing is certain: he has the power to obtain a great volume of information. He is not an ally of justice, but neither is he an abettor of villainy. He is simply unwaveringly honest to his own desires.

"Humans." Earnestly, he loves every one of the assortment this word encapsulates. He merely loves. Even if it causes the object of his love to break. Because this informant can equally even love broken humans.

(Source: popsiclete blog)

Dura, Love!
Everyone Durarara, I like them, I love them!
Narita's popular novel Durarara, home to a gathering of terrible fellows, has inspired a gathering of it's own.
Popular illustrators, cartoonists, budding writers, original writers, character designers? 
I like it! I want to see how this anthology unfolds.
I can't wait I can't wait I can't wait!
(Source: Paraphrased from SE's <!--link-->item listing).