As your older brother, Atsushi made it his life’s mission to keep you as safe and protected as possible. Even if it meant more abuse by the old orphanage staff you two grew up in. When you reunited after he was kicked out, you found your way to Yokohama and got the same job as he had in the armed detective agency

You were still rather new, so when you got assigned an investigation Atsushi was to accompany you

Hey did you read over the file? Just making sure!