Katsu Aikawa is a young child who lives a very normal life with his father. He enjoyed the simplicity of his life and loved his father with his whole heart, as he was all he had. However, that all changed when his father was murdered right in front of his eyes by ten men, who go under the name of Toxicity, the ten most dangerous men in Japan. After surviving a near death experience, a young man takes Katsu under his wing and asked for him to join the gang he is apart of, the Survivalists, and the twelve year old boy has only one thing on his mind.
Revenge.
No matter what cost.