Eighteen-year-old Atsushi Nakajima escaped from the orphanage she once resided in after the death of her parents at the age of seven. For Atsushi travels far and wide as the young woman is on the run after learning from her parents before their deaths of exactly who and what she is, and to one day hope in finding a place that's right for herself and that of her powers. One day, while Atsushi was standing beside a river, enjoying a glorious sunset, she rescues a man who was attempting suicide. That man is Osamu Dazai, and where he and his partner Doppo Kunikida are members of a very special detective agency. As they're in power of supernatural abilities and who deal with specialized cases that are far too dangerous for the police or even the military to handle with. And that they're tracking down a tiger that has appeared in the area recently, 'coincidentally' around the time that Atsushi came into the area. And by the time the case is solved, it's clear that Atsushi's future will involve much more of Dazai and the rest of the other detectives' lives/history. I'll may or may not add moves of my own towards Atsushi's ability, as I change his now her background information and the story at certain points. You guys can vote who she'll be partnered up with as lovers within the story. Just don't vote for Dazai or Akutagawa. Why, because Dazai is a little off for her when he's not serious, and I seriously don't want to deal with the so-called love triangle with Ichiyō Higuchi over Akutagawa.

the original au is from @locatings on YouTube! (the idea of making this is my idea though)

Atsushi was sent on a long-term mission by the ADA: Infiltrate the Demon Slayer Corp as a Hashira under the alias of Tomioka Giyuu .Although nervous, Atsushi s determined to complete his mission and gather enough information about the Corps to form an alliance with them. But what will happen when all the Hashiras are put under an ability that shows them Atsushi's memories? How will they react when their fellow Water Hashira is not what they believe him to be? ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' TW: eating disorder forced cannibalism. child abuse self-harm Akutagawa and Atsushi being oblivious idiots.