 If you liked
Ima, Soko ni Iru Boku
|
 ...then you might like
Phantom: Requiem for the Phantom
|
Both feature a Japanese teen learning to cope with a crapsack kill-or-be-killed world, all while trying to do something beneficial with their lives.
These shows are incredibly similar, both starting with the main char getting essentially abducted and forced to join corrupt/evil groups. Even the meaty bits during and after all those things are very similar. Not to mention they both have powerful creepy old men who like the touching the female lead.