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1. Harry Potter and the Beast of Despair by Eleos_Argentum

   Fandoms: 文豪ストレイドッグス | Bungou Stray Dogs, Harry Potter - J. K. Rowling  

   • Explicit
   • Graphic Depictions Of Violence, Underage Sex
   • M/M
   • Work in Progress

   14 May 2026

   Tags

   • Graphic Depictions Of Violence
   • Underage Sex
   • Dazai Osamu/Nakahara Chuuya (Bungou Stray Dogs)
   • Dazai Osamu (Bungou Stray Dogs)
   • Nakahara Chuuya (Bungou Stray Dogs)
   • Harry Potter
   • Albus Dumbledore
   • Tom Riddle | Voldemort
   • Severus Snape
   • Ron Weasley
   • Hermione Granger
   • Fred Weasley
   • George Weasley
   • Ginny Weasley
   • Draco Malfoy
   • Dolores Umbridge
   • Order of the Phoenix
   • Order of the Clock Tower Ensemble (Bungou Stray Dogs)
   • Agatha Christie (Bungou Stray Dogs)
   • Salazar Slytherin
   • Dazai Osamu is Voldemort's grandson
   • Heir of Slytherin
   • Idiots in Love
   • Dazai Osamu/Nakahara Chuuya's Unconventional Mating Rituals (Bungou Stray Dogs)
   • Book 5: Harry Potter and the Order of the Phoenix
   • Post-Stormbringer Light Novel (Bungou Stray Dogs)
   • Other Additional Tags to Be Added
   • Minor Character Death

   Summary

   Having reservations regarding Verlaine’s demise, the Order of the Clock Tower approaches Dumbledore with a proposition: guarding the former spy's last target and the mastermind behind his defeat at Hogwarts, and having them serve as protection for one Harry Potter.
   Even though Ability Users in general are regarded as no more than “Resourceful Muggles”, the title of “King of Assassins” is well known among certain circles of the magical community, and there are those who fear him even more than they fear the Dark Lord.
   A ghost from the past wanders the halls of Hogwarts once again, the call of blood resonates through time, and the Beast of Despair lurks in the shadows.

   Set in OoP and after Storm Bringer.

   Language:

   English

   Words:

   16,178

   Chapters:

   2/?

   Comments:

   16

   Kudos:

   100

   Bookmarks:

   21

   Hits:

   808