In a city known as No.6, an elite student named Shion saves a young boy called Rat, who happens to be an escapee from the local prison. After being reunited with Rat years later, the two begin to uncover the dirty secrets of the 'ideal city' No.6 while discovering more about themselves and their love for each other along the way.—Emily Dean
A very smart student named Shion saves another young boy, Rat, who had escaped from a local prison. Years later, they are reunited and begin to uncover the dark side of their supposedly ideal city known as "No. 6" They discover the city's secrets as well as exploring themselves and feelings toward each other.