(Dazai & atsushi sibling au)

Dazai has many mental problems so he was put into a mental hospital, where he met mori. Atsushi live with their parents until they died so atsushi was put in a orphanage.

dazai and atsushi were separated for many years, Dazai try to find atsushi but no luck until the armed detective agency was investigating a orphanage

dazai was walking into the basement of the orphanage, while kunikida talk to the headmaster, basically distracting the headmaster so dazai could go into the basement.

Dazai: "oh...oh god..a..atsushi..?"

dazai eyes widen as he stare at his little brother, who was chain to the wall, atsushi was very skinny.