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1. Hemolytic Autoimmunity by MatchaOcha (HakuSeki)

   Fandoms: はたらく細胞 | Hataraku Saibou | Cells at Work! (Anime), はたらく細胞 | Hataraku Saibou | Cells at Work! (Manga)  

   • Explicit
   • Graphic Depictions Of Violence
   • F/M
   • Complete Work

   06 Oct 2025

   Tags

   • Graphic Depictions Of Violence
   • Red Blood Cell AE3803/White Blood Cell U-1146 (Hataraku Saibou)
   • Red Blood Cell AE3803/White Blood Cell U-4989 (Hataraku Saibou)
   • Red Blood Cell AE3803 (Hataraku Saibou)
   • White Blood Cell U-1146 (Hataraku Saibou)
   • Killer T Cell (Hataraku Saibou)
   • White Blood Cell U-2001 (Hataraku Saibou)
   • White Blood Cell U-2048 (Hataraku Saibou)
   • White Blood Cell U-2626 (Hataraku Saibou)
   • White Blood Cell U-4989 (Hataraku Saibou)
   • U1146xAE3803
   • implied U4989xAE3803 in later chapters
   • Post canon
   • AIHA - Freeform
   • contains a couple OCs
   • slight unrequited love bits
   • some angst in later chapter
   • Fluff
   • Smut
   • Porn with Plot
   • Plot With Porn
   • Breeding Kinks
   • outdoor sex in later chapter lol
   • Strong Profanity
   • Graphic Violence
   • Blood depiction
   • genocide plot
   • life in danger scenes
   • fighting with knives
   • neutrophils - Freeform
   • band of brothers trope
   • references to other fics
   • References to Canon
   • may contain some medical inaccuracies
   • i'm not a doctor lol
   • Mind Control
   • cell activation
   • sacrificial save
   • possible deus ex machina scene
   • slight tragedy
   • multi-chapter

   Summary

   All the immune cells are suddenly ordered to kill off all the red blood cells in the body. As nearly all the other immune cells are carrying out the destruction, 1146 is determined to protect AE3803 at all costs from an untimely death as he tries to get the chaos to end while trying to overcome all the conflicts that come with it.

   Heavy U1146xAE3803 throughout with implied U4989xAE3803 in later chapters.

   Drama/romance. Semi-tragedy.

   Rated E for graphic violence, occasional cussing, and explicit sexual scenes.

   Estimated total reading time: 4 hours, 2 minutes.

   Language:

   English

   Words:

   51,142

   Chapters:

   24/24

   Collections:

   1

   Kudos:

   66

   Bookmarks:

   11

   Hits:

   1,250