This is Shibuya but not Shibuya.
15 year olds living in a vitural world.
Sh15uya (Shibuya 15)
Only the pain....is real.

Shibuya 15 AKA Sh15uya is different from your usual masked hero type show.

The story focuses on Tsuyoshi, a 15 year old who wakes up in an alley with no memories and with only a written message hidden in his mouth telling him to escape Shibuya from someone called Revi.
He quickly discovers that the city is run by 3 rival street gangs, the Palhands, which he discovers that he is a member of, are power hungry and will do anything to get what they want.

The LoveGen is a all female gang in which the leader befriends and falls for Tsuyoshi.
And the Bunkamu, who are street dancers and love sports.

It's revealed that an entity called Peace hunts down kids who have a special mark that appears on their hands if they go crazy, try to seriously kill someone or something else extreme. His job is to kill them and no one tries to stop him, not even those who are marked.

Then there's Ema, a strange girl who can summon some sort of armor which allows her to fight and kill Peace whenever he appears. The kids hate Ema and it seems that Tsuyoshi was close to her before he lost his memories.

Peace cant be truly killed cause he takes control of an adult's body and seems to be able to return from the dead.

Ema is heartbroken to find that Tsuyoshi's memories are gone and seems to be wary of a giant blimp which has a giant eye on it's side that hovers above the city.

Ok, right of the bat you can tell this show is different from your usual Japanese super hero shows. The story revolves around young kids in gangs and talk about violence and sex. There's kids being stabbed, having their skull crushed in from pipes and other gruesome deaths and the good guy may not actually be good.....

This is something you need to check out. With only 12 eps, the story is fast paced and the action is very well done. Some cheesy CGI but it's all good.
(Random Fact: The person who plays Tsuyoshi is actually a girl.)

Dark Kings:
If you ever seen Fist Of The North Star, then you will love this show.
Taking place during FOTNS, Dark Kings follows Kenshiro's older brother Raoh as he tries to conquer the world.

Fast pace action, tons of killing, rape and stealing. This is not a kids anime. This is a real man's show.

Some may think this show is just about senseless violence but there's more to it. The plot is deep despite being only about 13 or so eps and the characters where very well developed. We get to see a different side of Kenshiro's world.

I've only seen a few eps but you really need to see this anime.