English is not my first language, so if there are errors, I'm sorry.

I don't own Bungou Stray Dogs or RWBY

When Dazai open eyes, he was feeling as if he was hit by a truck, and he knows that exact feeling, but worst. He examined his surrounding, which was some alley he did not know. It's daytime.

The last thing he remembers was his and Kunikida's investigation. They were to apprehend a criminal, Kaede Omae, with some sort of transportation ability. He wanted revenge upon Armed Detective Agency, so in any given chance he was trying to harm it's members. Omae wasn't even trying to escape with the help of his ability. He was only looking to do harm. He decided to use his ability on Dazai. That's were something went wrong.

Dazai's ability, No Longer Human, allows him to nullify others' abilities on contact. He can nullify any ability as soon as it touches him.

But Omae's ability momently transport person or object in chosen location.

The moment it touched him, the moment it nullified, Dazai was already in the process of transportation. He could only guess that because of this, he was not in place that the criminal intended for him.

He was not sure if it was good or bad thing.

First things first, he need to find where he was. Who knows, maybe there's some beautiful places for suicide?

As soon as Dazai come out of alley on busy street he understood that he was really far from home. He didn't recognize this place in any way.

People talking in English. He could tell that technology was slightly more advanced than what he used to. Architecture of buildings was something he did not recognize. Some buildings over ten storeys high while others were just two.

He need information, and what a better place to find it then library?

Good thing he is fluent in English.

After asking people around, and couple of refusals to commit double suicide from some beautiful ladies, he found a local library. Through his search, he noted that some people have animal ears, tail or some other animal attribute, that look quite natural. He would also look about that.

Dazai spends hours with different books until evening came and was time to close the library. After a reminder of the closure from a elderly librarian, he began to walk slowly along the city street, as he learned called Vale, and thought about the information he had read.

He was in different world, the name of which is Remnant, which may be described as a future-fantasy world with airships, high-tech weaponry and a form of natural energy called Dust. Oh, and here they have a shattered moon. And while he knew about multiverse theory, it's quite surprising to find himself in other dimension, world, universe, whatever.

The early history of Remnant has been long forgotten, with recollections being passed down in the form of myths and legends. Remnant has the four kingdoms, which are Vale (center), Vacuo (west), Atlas (north) and Mistral (east). . Remnant is populated by two intelligent species - humanity and the Faunus, people with animal characteristics he saw.

All of the inhabitants of Remnant are beset by the Grimm, which are described as "creatures of destruction" and lack a soul. Huntsmen and Huntresses fight the Grimm and protect the peace of Remnant and its people. Each kingdom have a Huntsman Academy.

But the most interesting he found something akin to abilities from his world in this world – aura and semblance. In Remnant, all living creatures possess a soul, the physical manifestation of which is known as aura: a form of innate energy that bestows its user with certain abilities and powers. Semblances are unique expressions of this power and are akin to abilities, a personal superpower unique to each person.

His ability can be associated with semblance. He should somehow check if it still works and if something changed in it from being thrown in this world.

Also, he was curious if he have aura. If in this world abilities equals semblances, he may have it active. Or if not, could it be activated?

Can he come back to his world? Made he everyone in Agency worried? He would bet such situation isn't anywhere near Kunikida's ideal.

But now he have more urgent issue at hand. If he didn't want to sleep on street, which he didn't, he would have to acquire some local currency, lien. And he already can see who will help him with it. Street thugs in all worlds seem alike. Typical trio of disheveled looking men that glared at everyone and everything.

Dazai walked toward them with light steps and humming one of his favorite songs.

"It's a little sudden but I think~

I will hang my neck now~

I think I want to say farewell~

because of this miserable world~"

And of course he accidently collided with thug on the right.

"Hey! Look where you're going, idiot!" was the typical thug's response.

Dazai done as any other innocence person in this situation would do.

"Oh! I'm so sorry! Are you okay?" he asked with the look of sheer innocence.

And as any decent group of street thugs, they pushed him into the nearest deserted alley and demanded compensation for his obvious wrongdoing.

And if someone heard muffled screams for few seconds or noticed cheerful and humming Dazai coming out of said alley few minutes after, no one did anything about that.

He learned something interesting. One of the thugs had three vials of ice dust and he tried to use it as described in one of the books from library and it worked but not like intended. It disappeared. His guess is that happened due to his ability. Will he also be able to nullify effects created by dust?

Dazai again walk on streets of Vale with light steps and humming suicide song, but now richer by twelve thousand lien, two vials of dust and scroll (local version of telephone).

While exploring the city he decided to go up on top of nearest building, see the view of city, read The Complete Suicide Manual, which he almost always have with him and maybe attempt suicide.

Well, the view is certainly beautiful.

Going up on top of the building Glynda Goodwitch expected to see young girl in red and black and the infamous criminal Roman Torchwick. What, or rather who, she wasn't expected was young man calmly reading book while girl and crook are oblivious of his presence.

As if sensing that he's being observed young man lifted his head and meet her gaze with flat look. Upon meeting her stern look his eyes lit up, he smiled and cheerfully waved his hand.

Before she could somehow responded Glynda catch the sign of red dust crystal being thrown at girl's feet. She was ready to use her semblance but young man from earlier managed to push the girl aside with the hand in which he held the book, and the other hand directed towards the fire created by dust. She prepared to defend them when upon contact with his hand fire disappeared as if never existed.

"Ma, ma, is that any way to treat a young lady?" said young male with light smile putting the book in his pocket. He obviously wanted to say something more but was interrupted as someone new appeared on the ship, woman undoubtedly, and with the wave of the arm let loose a fireball. But like before as soon as fire came in contact with young man it ceased to exist.

While woman on the aircraft was still in shock at what happened, Glynda with a wave of her riding cope send a dozen purple beams in the ship. This caused ship to shift rather precariously but the pilot righted it before quickly flying away.

Red themed girl looked at the two of them almost with stars in the eyes.

"You guys are hunters", she said with awe, "Can I have your autographs?"

Glynda leveled her with glare, young man started to laugh.