ChuuAtsu

ChuuAtsu is the slash ship between Atsushi Nakajima and Chuuya Nakahara from the Bungou Stray Dogs fandom.

Canon
Atsushi and Chuuya have never met in the canon universe. They are both in competing agencies, Atsushi in the Armed Detective Agency and Chuuya in the Port Mafia.

The characters don't have many similarities. Atsushi and Chuuya are rather big opposites. However, one thing they do have in common is the fact that both of them can say they really know Dazai quite well, which is pretty rare.

When Atsushi falls from the Moby Dick during his escape in the second season, the first thing he sees is Chuuya directing the Port Mafia in keeping the city safe from Q's curse. It makes Atsushi realize that even the Port Mafia has some good in them.

Bungou Stray Dogs Wan!
While not having any interaction in the canon universe, they have several interactions in the spin-off series.

During the preschool chapter, Chuuya eggs on Atsushi, saying Atsushi is too scared of him to tease him, which Atsushi responds by saying even though he's older Atsushi is still taller than him. This annoys Chuuya, who says he'll be tall in the future because he drinks milk, and saying if Atsushi drinks it that he can grow as well.

Another time they meet is when Chuuya is helping an elderly lady with her heavy baggage, hoping no one sees him. However, Atsushi is out getting groceries when he sees him, and is shocked to see Chuuya helping out an elderly woman. Atsushi begins to walk away and Chuuya yells at him, saying he's misreading the situation. Atsushi smiles and says he understands that even though the mafia is scary, there are still some people who are really kind, which only frustrates Chuuya more.

Fanon
The ship became popular in spite of the fact that neither of the two characters has met each other in canon. The fandom thinks they could have good chemistry if they did meet, since they both have to deal with Dazai and, even though Chuuya doesn't show it as often, they are both very empathetic people.

Despite being one of the rarepairs in the Bungou Stray Dogs fandom, it has a lot of content on sites such as Archive of Our Own and Tumblr. In AO3 the are 550+ works of the ship. It is also the 3rd most wrtted ship forboth characters. It is a parallel with DazAku, as it involves characters from the most popular duo Soukoku and Shin Soukoku.

Fandom
FAN FICTION

TUMBLR