My Ninja System War Love Revenge

This story is about the struggle of a 17 year old boy named Kevin, who is a part of a world of ruthless ninjas, where the weak had no right to live, always grew up with loneliness. At the age of 17, Kevin headed towards the gallows. Because he didn't have any ninja powers. But that day a mysterious incident happened which changed the entire Ninja society and a new sun rose in Kevin's life, when the Ninja System was installed in his body.
What happened that day? What is the secret of Ninja system?
Who is Kevin? What happened to his parents? Read this amazing story full of action and adventure Ninja System war love revenge.