Back and Forth × Way of Fire × BSD fanfic

First volume of Back and Forth First of all, I do not own many of the characters here. They belong to Kafka Asagiri. This is a Bungo Stray Dogs fanfic and the storyline takes place between DEAD APPLE and the third season. Eighteen year old Tanigushi, scared and all by himself, is looking for a new home for seven year...