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1. Someday, Sweetheart by Jenjentheboscostick

   Fandoms: Chicago Fire  

   • Mature
   • No Archive Warnings Apply
   • M/M
   • Complete Work

   26 Jun 2026

   Tags

   • No Archive Warnings Apply
   • Matthew Casey/Kelly Severide
   • Matthew Casey
   • Kelly Severide
   • au s7
   • Prank Divergent Sevaasey Weird Series
   • Sevasey raising the Darden Boys (mentioned)
   • Established Relationship
   • Marriage Discussion
   • Dates
   • Clothes Sharing
   • semi public sex (mentioned)
   • Kissing
   • Cute
   • Fluff
   • taking last names discussion
   • Holding Hands
   • Secret Relationship
   • Flirting
   • Swoon June 2026

   Summary

   A discussion on Severide's *thing* for Casey wearing his name and his clothes, leads to a discussion on last names for when they get engaged - someday.

   Series

   • Part 26 of Prank Divergent Sevasey Weird Series
   • Part 36 of Swoon June 2026

   Language:

   English

   Words:

   2,031

   Chapters:

   1/1

   Collections:

   1

   Comments:

   4

   Kudos:

   27

   Bookmarks:

   2

   Hits:

   452