Bungou Stray Dogs: Dead apple

1) Firstly, what is Bungou Stray Sogs (bsd for short)?

Bsd is an animated series cycling about Armed detective agency and the port mafia being against each other. It’s genres are comedy and action. All of the main characters posseses special abilities.

Bsd: Dead Apple takes place after the second season of bsd. Armed Detective Agency (ADA) is called upon to investigate the apparent suicide cases of hundreds of supernatural ability-users around the globe, which occurred when a mysterious fog passed over their countries. The Special Operations Division deduce that this incident is tied to Shibusawa, now a self-proclaimed „collector“.. That night the protagonist Atsushi Nakajima and his companion Kyouka Izumi both dreamed of the unsettling mist or the fog if you insist. Atsushi’s dream was that he was standing in front of a door that had tiger head on it with blue glowing eyes with voices surrounding him stating that he shouldn’t open the door. Soon after waking up in the middle of the night realizing Yokohama was completely engulfed in the fog. They went outside to investigate but no one seemed to be around. Like every other person beside ability users just dissapeared. Kyoka and Atsushi meet with their superior Doppo Kunikida who reveals that the deaths of ability-users were due to their abilities turning on them. Shibusawa is revealed to have created the fog to draw out Yokohama's gifted, turning their abilities into jewels for his collection while powering the fog.

2) Even as far as to revealing that „The collector“ has teamed up with a former Port Mafia member and current member of ADA, Osamu Dazai and villain of the whole bsd series Fyodor Dostoesvky. Kyōka and Atsushi make contact with government agent Ango Sagakuchi, who had located the Agency's other ability-users, all of whom are fighting their own abilities. As Kunikida leaves to fight his ability Doppo Poet. the duo encounter mafia member Ryunosuke Akutagawa who is fighting his ability. All three of them now have to fight thein own abilities. Kyouka has to fight her ability Demon Snow Atsushi has to battle the Beast Beneath the Moonlight and Akutagawa has to fight Rashoumon. Atsushi deduces that subduing the ability involves destroying embedded jewel in them and once they would destroy it, They would have gotten thein abilities back and could use them again. Fyodor meanwhile finds two jewels from two more gifted ones succumbing to thein abilities: one which can summon all gifted within sight, and another which can crystallise abilities after their users have died. Dazai, who was secretly working against Shibusawa, nullifies them depriving the fog of its power source. However, having anticipated this, Shibusawa stabs Dazai with a poisoned knife, intending to steal his ability and transform Dazai into the core of the „dragon“, the chaos of all special abilities, to destroy Yokohama. As the dragon is created and emerges from the ground it wreaks complete chaos and Havoc. Suddenly a gifted agency in London called Order of the Clock Tower dispatches a fire gifted to Yokohama in order to destroy the city with the dragon to prevent it from spreading. However the goverment contacts one of the most powerful Port Mafia members Ch. Nakahara and former collegue of Dazai Osamu to destroy the dragon with his ability For the Tainted Sorrow.