As it centers around two main protagonist, from the very start I could see there was a lot of backstory to them and that they trusted each other completely. (Something shown by wearing each others' clothes, usually people who grow up close to each other do that, usually within a family.)
Reading the summary there's not much story revealed and it's not immediately revealed in the anime either. I can't say much about it without spoiling, however what I can say is that I can't precisely determine when it starts considering it doesn't end by the end of the anime (an ending hated by many, actually). I enjoyed it at least. What I mostly enjoyed about the story telling is the exposition. We're never explicitly told what happened in the world of Gangsta. and the whole time we're learning through second-hand information or just by drawing conclusions that the artists wanted to show us.
To help tell the story, sound and art interact very nicely. You will notice the art is similar to the one of Shingeki no Kyoujin (thick lines and greyish colors that remain consistent through the story, nothing at all like No Game no Life, which is why it's beautifully reminding us we're present in the world' reality). Unfortunately you can also see the production value drop in a couple of scenes that follow after high-quality animation during fights (that occupy 50% of screentime).
Well, they have to considering our main characters mostly fights with others. Now, what I personally enjoyed the most /are/ the characters. I very rarely saw any characters with visible disabilities in other anime, and if I did they weren't in bad-ass roles like our two main characters (not mentioning Alex's invisible disability and her dealing with it). It's very easy to think her, and most of other characters as realistic portrayals of people and society when there's no building jumping, or axe wielding butchery.
Perhaps it's the representation of people with disabilities, or the different kind of exposition, but I thoroughly enjoyed Gangsta. even with it's ending, which doesn't bother me in the least. Personally, I think that if there were more animes like this there would still be too little of them.
If you like a good storyline, great characters and blood-pumping scenes with a lot of gore, I think you would like this anime.
