This is easily my favourite Japanese drama of all time. The story is full of suspense and is gripping from the very start, with the different 'games' that the characters are put through just become more and more exciting. The dark and devious Akiyama (Matsuda Shota) is a perfect match to the innocent and naiive Nao (Toda Erika) and the combination really works. The rest of the cast too are over the top, a bit crazy, but it perfectly fits the drama. The music used in this drama is sensational. It is a soundtrack I find myself listening to often, and each piece fits the situation in which they are used perfectly. Overall this is a brilliant quality drama. The writing is both witty and suspenseful, and never gets boring. Anyone who is considering watching it should, as they will not regret it.