In this world there was a lot of crimes like robbing and kidnapping but mostly was killing, you could see dead bodys all over the street but why?, Suzuki Airi was born with a powerful power (Darkness Power) this power is the strongest power at all her parents look nice and gentle but there is a secret no one know about them, is that they make their daughter go kill people so that they become the strongest. p.s : first time writing hope you like it.