Ikuta Toma and Oguri Shun play childhood friends set on avenging the death of their beloved teacher. To this end, Ikuta becomes a detective while Oguri has risen through the ranks of organized crime. This drama was adapted from a dark, seinen manga. In its 10 episodes, it can not possibly grasp the complexity in the original work, I feel like this drama does a great job realizing the feel and tone of the original work. It is great to see Oguri Shun and Ikuta Toma working together again. I really enjoyed having the opportunity to see Ikuta in a more serious role. I would advise that this drama is fairly dark and has a very somber tone. I wouldn't suggest it for anyone looking for a happy ending. Ouroboros' OST is so good, featuring songs such as "No One" and Arashi's "Sakura." You should definitely give it a try!