We both left. But this was your fault.

A week before Dazai left Chuuya found out what he had been doing to Akutagawa and over heard a conversation he had with Mori.

Heart broken and afraid he took both the Akutagawa siblings, took the bare minimum, and left the port mafia, running away to France.

He wrote a long letter for his now ex fiance and left his ring. They were meant to get married in a month.

Dazai was angry and heart broken. A week later Oda died. He left and joined the ADA.

Now it's been 4 years. Atsushi just joined the ADA a month ago and no one knows about Dazai's past. But the past will show soon.

Chuuya is coming with his family, the Akutagawa's now Nakahara's who he officially adopted, and his new fiance to visit Japan for a month.

What will happen and what will be revealed.

I do not own Bungo stary dogs, but there are some Oc's