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1. Mistake After Mistake (Took It Too Far) by smmiixx

   Fandoms: Shingeki no Kyojin | Attack on Titan  

   • Explicit
   • No Archive Warnings Apply
   • M/M
   • Work in Progress

   21 Apr 2026

   Tags

   • No Archive Warnings Apply
   • Armin Arlert/Eren Yeager
   • Armin Arlert
   • Eren Yeager
   • Mikasa Ackerman
   • Erwin Smith
   • Levi Ackerman
   • Connie Springer
   • Sasha Blouse
   • Jean Kirstein
   • Annie Leonhart
   • Reiner Braun
   • Bertolt Hoover
   • Krista Lenz | Historia Reiss
   • Ymir of the 104th (Shingeki no Kyojin)
   • Minor Levi Ackerman/Erwin Smith
   • Erwin Smith is Armin Arlert's Parent
   • Levi Ackerman is Mikasa Ackerman's Parent
   • Levi Ackerman & Erwin Smith Are Armin Arlert's Parents
   • Armin Arlert & Mikasa Ackerman Are Siblings
   • Minor Armin Arlert/Jean Kirstein
   • Secret Relationship
   • Miscommunication
   • Angst and Fluff and Smut
   • Minor Mikasa Ackerman/Jean Kirstein
   • Jean Kirstein is a Flirt
   • Emotional Infidelity
   • Cheating
   • on both sides lowkey
   • Sneaking Around
   • Background Relationships
   • Shameless Smut
   • Sex
   • Oral Sex
   • Blow Jobs
   • Anal Sex
   • Anal Fingering
   • First Time
   • Loss of Virginity
   • First Time Blow Jobs
   • Bottom Armin Arlert
   • Top Eren Yeager
   • Alternate Universe - High School
   • armin and annie are best friends
   • lowkey ooc

   Summary

   Eren is dating Armin's sister. Since the beginning, it hasn’t gone too well, but neither will end things. Instead, Eren thinks the better idea is to start a secret relationship with his girlfriend’s brother. Under the same roof. How bad could it possibly get?

   Language:

   English

   Words:

   24,577

   Chapters:

   6/21

   Comments:

   17

   Kudos:

   79

   Bookmarks:

   14

   Hits:

   1,365