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1. And with that, an obsession began by Problematic_Loser

   Fandoms: おそ松さん | Osomatsu-san (Anime), おそ松くん| Osomatsu-kun (Anime 1988)  

   • Mature
   • Graphic Depictions Of Violence
   • M/M
   • Complete Work

   11 Mar 2025

   Tags

   • Graphic Depictions Of Violence
   • Matsuno Karamatsu/Matsuno Osomatsu
   • Matsuno Karamatsu & Matsuno Osomatsu
   • Chibita & Matsuno Karamatsu
   • Matsuno Osomatsu
   • Matsuno Karamatsu
   • Chibita (Osomatsu)
   • Matsuno Todomatsu
   • Secret Crush
   • Sibling Incest
   • Brother/Brother Incest
   • Incest
   • Dead Dove: Do Not Eat
   • Obsession
   • Obsessive Behavior
   • Obsessive Matsuno Osomatsu
   • Matsuno Sextuplets Incest | BLMatsu (Osomatsu)
   • Jealous Matsuno Osomatsu
   • Jealousy
   • Physical Abuse

   Summary

   Osomatsu wants Karamatsu to be his and do what only he says...
   -
   This is a prequel to my previous fic
   "Wasn't there a better way to do this?"

   Series

   • Part 1 of Obsessive behaviour
   • Part 3 of Nym's fanfics

   Language:

   English

   Words:

   1,450

   Chapters:

   1/1

   Kudos:

   10

   Bookmarks:

   3

   Hits:

   412