Behind the shadow of Yokohama

This fanfiction, we combine it with Arc fifteen AU but Dazaku edition

The Port Mafia is investigating a mysterious savage ability that killed an entire gang of petty criminals in the port area. No witnesses survived. No trace. "The Ghost of Yokohama," the people call it.

The boss of the Port Mafia, Mori Ougai, sends young Dazai (15 years old) to investigate with Chuuya. They hate each other, but are forced to work together. While walking down the dark alley, Dazai finds something surprising.

A boy... matted black hair, eyes full of revenge and fear, abilities like a living shadow.

The boy almost kills Dazai with his first attack - but Dazai is attracted, not afraid. He sees himself in the boy. So he takes a risk - not kill him, but hide him. In an empty dilapidated building, away from Mori and Chuuya's eyes.