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1. Already Mine by Williamestic

   Fandoms: เธม-โป้ Heart That Skips a Beat | Thame-Po: Heart That Skips a Beat (TV) RPF, LYKN (Band), Thai Actor RPF, WilliamEst - Fandom  

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

   13 Jul 2026

   Tags

   • Creator Chose Not To Use Archive Warnings
   • William Jakrapatr Kaewpanpong/Est Supha Sangaworawong
   • William Jakrapatr Kaewpanpong & Est Supha Sangaworawong
   • William Jakrapatr Kaewpanpong
   • Est Supha Sangaworawong
   • Possessive Behavior
   • Office Sex
   • Fluffy Ending
   • Angst with a Happy Ending
   • Romantic Fluff

   Summary

   After another endless meeting, William is ready to call it a night—until Est appears in the doorway, messy hair and eyes burning with intent. What begins as teasing banter quickly spirals into something more heated, as William learns that Est isn’t just here to wait for him… he’s here to claim him.

   An office desk, a loosened tie, and a possessive promise: “You don’t have to ask. You’re already mine.”

   Language:

   English

   Words:

   12,413

   Chapters:

   9/9

   Comments:

   23

   Kudos:

   238

   Bookmarks:

   22

   Hits:

   7,587