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1. The Case of the Libertine Setter by Iluvsuga

   Fandoms: Haikyuu!!  

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

   17 Aug 2025

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Kageyama Tobio/Oikawa Tooru
   • Oikawa Tooru
   • Kageyama Tobio
   • Iwaizumi Hajime
   • Hanamaki Takahiro
   • Matsukawa Issei
   • Sugawara Koushi
   • Sawamura Daichi
   • Tendou Satori
   • Ushijima Wakatoshi
   • Kindaichi Yuutarou
   • Kunimi Akira
   • Yamagata Hayato
   • Semi Eita
   • Oohira Reon
   • Hinata Shouyou
   • Irihata Nobuteru
   • Mizoguchi Sadayuki
   • Sawamura Daichi's Father
   • Silliness and shenanigans
   • Fluff
   • Mild Angst
   • no Haikyuu characters were harmed in the making of this story
   • Mystery
   • smartypants Oikawa
   • Training Camp
   • High School
   • Secret Relationship
   • practical joke
   • remember "major character death" was NOT tagged
   • Happy Ending

   Summary

   At a training camp consisting of Shiratorizawa, Aoba Johsai and Karasuno Oikawa insists that he is smart enough to solve any mystery or to outsmart anyone trying to fool him. As the training camp continues a secret is uncovered and an unlikely alliance among some of the other third years emerges to test Oikawa's ability to figure out if he's being pranked or if there is a real mystery to solve. The question is...does he figure it out first or does someone else save the day?

   Language:

   English

   Words:

   10,964

   Chapters:

   5/5

   Collections:

   1

   Comments:

   29

   Kudos:

   75

   Bookmarks:

   7

   Hits:

   1,274