Basically saying Orihara Izaya got jealous that everyone was invited to a hot pot party except for him and decided to ruin things up in Ikebukoro, seriously though that dude is enough to create World War Three.
Story: This is a good sequel in my opinion. The main antagonist cooks up the whole story- it's his stage and his play, he himself is an actor and others also dances according to his wishes. Since this is a continuation there's nothing much to tell about the story or plot, but it was worth seeing how the underdogs and the mafia conspire within the deadly silent night of this beautiful city. Even within the darkness- the people who live in it, have their emotional attachments and desires which of course proves that they are human. The main plot focuses on a child running away from home and it shows how unpredictable conflicts can occur from a one simple incident.
Art: There were some changes from the previous season- some of the character designs have been changed and i think that is a valid add. Loved the landscape and scenic atmosphere no doubt the artists worked hard for them. DRRR is famous for the epic intro they give out in the opening and the animation of the ending was very creative. The ending sequence shows a vast image of characters being interconnected together which in my opinion is quite confirming their relationships upto an extent.
Sound: The voice dubbing is superb as usual- it's really hard to think everytime for me that it's actually Daisuke Ono that is voicing Shizuo, along with the most recognized voice actors in anime history: Fukuyama Jun,Mamoru Miyano,Hanazawa Kana- they all did justice to their job,no complains there. The openings of DRRR has been superb this far. I liked the opening of this season it totally suited the atmosphere, the ending was quite fine and the OST's weren't that notable in my ears but they were unique and mysterious as required.
Character: The most interesting concept of this anime are the characters, you don't get major sadistic directors like Orihara Izaya in every anime for sure. I liked the addition of the new characters- especially Wakaba and the Twins they are very entertaining. I loved that the producers of this anime added a child to get the reactions of the other characters that is one excellent plus point. And of course we can't forget the supernatural characters who made this anime a whole lot interesting and their relationships within the city and how they cope with it is a brilliant addition to the plot.
Enjoyment: I'm sure everyone enjoyed this sequel- there were the required anticipation,excitement because of the plot twists. The only con is that there wasn't screen time given to Shizuo to beat up that "flea bag" which i regret every time that he misses the chance because the flea bag runs away from him. They added unique bits which are different in the previous season- so they achieved the quality of the anime wonderfully. I loved how the anime ended- loved it so much that i decided to give an 8 without thinking about other things. In a way "killing" is just a native thing in this anime, sometimes you wonder who's side you take and who's side the characters will take.
Overall: I think one reason why this anime got successful as a sequel was that it gave the spotlight to the required characters and also to the newly introduced ones which is unbelievable and what most of the anime shows lack. This season totally deserves an 8/8 for all the epic moments and enjoyment and i would definitely pray for another season.