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1. The M.A.C. System by fulltimegirlfailure

   Fandoms: It's Always Sunny in Philadelphia  

   • Explicit
   • Creator Chose Not To Use Archive Warnings
   • M/M
   • Complete Work

   25 Feb 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Mac McDonald/Dennis Reynolds
   • Mac McDonald & Dennis Reynolds
   • Mac McDonald
   • Dennis Reynolds
   • Original Female Character(s)
   • Closeted Mac McDonald
   • Dennis Reynolds is a Bastard Man
   • Bruises
   • Marking
   • Under-negotiated Kink
   • Hurt No Comfort
   • Unresolved Sexual Tension
   • Unresolved Emotional Tension
   • Angst
   • Codependency
   • Mind Games
   • Power Imbalance
   • Kneeling
   • Repression
   • Obsessive Behavior
   • Implied/Referenced Homophobia
   • Misogyny
   • Religious Imagery & Symbolism
   • Praise Kink
   • Orgasm Denial
   • Taking A Joke Seriously
   • Mildly Dubious Consent

   Summary

   "Did you think about me whilst you fucked her?"

   Mac’s hope for diffusion dissipates instantly, leaving something incomprehensible in its wake.

   "No man. What the fuck." There’s something starting to overboil inside, making his answer a hiss.

   Recklessly, he rushes out "Unless that’s what you wanted Den?"

   "Such a pleaser Mac."

   Canon divergence from ‘The D.E.N.N.I.S. System'.
   Mac’s got his Move-in After Completion system down to an art but has his scheme been as subtle as he thinks?
   (Of course not.)
   Bruising moments shall ensue.

   Language:

   English

   Words:

   7,208

   Chapters:

   1/1

   Comments:

   16

   Kudos:

   52

   Bookmarks:

   5

   Hits:

   564