Seventeen years ago, an utterly immortal human was discovered on an African battlefield.
Since then, more of these new and unknown life forms began to appear among mankind. These undying beings start to be known as "demi-humans."
One day, just before summer break, a Japanese boy leaving his high school is involved in a traffic accident that kills him on the spot.
Then, he comes back to life. A huge bounty is placed on his capture. Now the boy's attempt to evade all of mankind