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Everything goes downhill when the prince of the strongest reigning royal family attempts to end it all, and a mysterious assassin in a mask saves his life. Kasai Shiromaru- a hitman working in the deepest and darkest corners. Hikaru Tsukumo- a suicidal prince who probably needs solitary confinement. The tides turn rapidly as a fatal outbreak of a strange illness takes over, and both are thrown into matches in a dystopian world where they have to fight to the death in order to save everything.

This series is rated Mature. Please review the Content Ratings page for more information.