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1. Mathematicians wryly call them the twin primes by Carabia

   Fandoms: Original Work  

   • Mature
   • Creator Chose Not To Use Archive Warnings
   • M/M
   • Work in Progress

   20 Dec 2025

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Original Male Character/Original Male Character
   • Original Male Character(s)
   • Original Female Character(s)
   • Incest
   • Sibling Incest
   • Brother/Brother Incest
   • Twincest
   • Implied Childhood Sexual Abuse
   • Religious Content
   • Suicidal Thoughts
   • Self-Harm
   • One-Sided Attraction
   • Unreliable Narrator
   • M/F relationships in backstory
   • Past Rape/Non-con
   • the past sexual abuse is not shown explicitly but is significant to the narrative
   • Mild Smut
   • Catholic Guilt
   • Catholic-Typical Homophobia

   Summary

   Mark is a lonely and pathetic first-year university student who is unironically in love with his unstable twin brother, Keiran. When Keiran doesn't study for his midterm, Mark decides to take his place and do it for him.

   The plan goes perfectly until Keiran's boyfriend-- a Twitch streamer named Michalis, who Mark can't stand-- sees Mark in disguise, not realizing who he really is.

   Language:

   English

   Words:

   113,907

   Chapters:

   23/?

   Comments:

   86

   Kudos:

   94

   Bookmarks:

   6

   Hits:

   3,438