No.6

In a near-future world devastated by war, humanity now resides in six city-states, seemingly perfect utopias. Shion, an elite resident of the city-state No. 6, leads a privileged life until he encounters Nezumi, an escaped convict. On the eve of his twelfth birthday, Shion's act of kindness in sheltering Nezumi results in his demotion to the lower town, stripping him and his mother of their elite status. Four years later, Shion's life is turned upside down again as he reunites with Nezumi and becomes entangled in a dangerous conspiracy that reveals the sinister secrets of No. 6.

As mysterious deaths plague the city, Shion is arrested on suspicion of murder, only to be rescued by the reappearing Nezumi. Now fugitives, Shion and Nezumi must navigate the treacherous outskirts and uncover the truth behind the city's façade. Their journey is one of survival, uncovering dark conspiracies, and challenging the perceived perfection of their world. Together, they seek to expose the true nature of No. 6 and fight for their lives in a society that punishes those who dare to question its integrity.