Project_Null
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Sea of Shadows and Misery || On Hiatus by Project_Null
Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)
12 Jan 2026
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Summary
At the age of 18, Dazai ran away from the mafia to fulfill Odasaku’s dying wish. When he ran away, he ran to a region of Japan bordered from the rest of the world, still stuck in the Taisho Era. He quickly learned of the Demon Slayer Corps and was able to finish Final Selection. He quickly moved up the ranks due to his knowledge from the Mafia.
Three years later, he is known as Giyuu Tomioka and has a new life for himself free from the Port Mafia. Until Mori shows up at a Hashira meeting, stating that he will be assisting Shinobu. Along with him, he brought Chuuya and Akutagawa. This has thrown off Giyuu’s entire plan to live a life away from the Port Mafia.
Giyuu now lives his life in fear of being discovered as Dazai Osamu, the Demon Prodigy.