Project Z: Reincarnated Into A New World

Five years ago, the government launched a experiment on 100 of youngest children that wanted to have a change in their lives. All these children were used as test subjects, they were ranks from Rank-F all the way to Rank-A. Rank-F's were horribly tortured and harnessed by the higher ranks. While the Rank-F's are getting this harassment, the Rank-A's are treated with respect and treated like royalty. We now will go to our protagonist, Kouki. Kouki is in a random void waiting to be reincarnated.