I Deliver Couriers, and I Also Send Enemies on Their Way.

I'm a courier. But the last delivery I sent was the life of my enemy. Seventeen years ago, my sister was forced to jump off a building by school bullies. Her father sought justice for her and died unjustly. As a result, my mother led me to a dead end. In the end, I was the only one left alive, and I gained special abilities. Everyone said it was just an accident. But I know that none of the real murderers have been punished. From that day on, I waited for seventeen years. During the day, I shuttled through the streets and alleys of the city, delivering express delivery. At night, I use my special abilities to find every sinner hiding in the darkness. Every time an order is sent, an enemy falls. Until the most powerful detective in the city spotted me. He wanted to catch the Avenger who wandered outside the law. And I just want all those who owe money to pay with blood. This is a reckoning seventeen years overdue. They don't know. Their express delivery finally arrived.