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   The Study of Cross-Species Astro Neurobiology (The Official Ryland Grace Guide to Alien Flirting) by powerxtrip

   Fandoms: Project Hail Mary (2026), Project Hail Mary - Andy Weir  

   • Explicit
   • No Archive Warnings Apply
   • M/M, Multi
   • Complete Work

   02 Jun 2026

   Tags

   • No Archive Warnings Apply
   • Ryland Grace/Rocky
   • Adrian/Rocky (Project Hail Mary)
   • Adrian/Ryland Grace/Rocky
   • Ryland Grace
   • Rocky (Project Hail Mary)
   • Adrian (Project Hail Mary)
   • Original Eridian Characters (Project Hail Mary)
   • Alien Cultural Differences
   • Flirting
   • Polyamory Negotiations
   • Alien Biology
   • Alien Sex
   • Eridian Culture & Customs (Project Hail Mary)
   • Eridian Biology (Project Hail Mary)
   • Grinding
   • Light Bondage
   • Anal Sex
   • Anal Fingering
   • Xenophilia
   • Oviposition
   • Dacryphilia

   Summary

   Grace and Rocky survived the trip to Erid. Now, all Grace has to do is live on a planet meant to kill him, charm his best friend's mate, and figure out why all these Eridians keep giving him rocks. Easy right? As long as he doesn't die of scurvy, first.

   Language:

   English

   Words:

   38,566

   Chapters:

   3/3

   Comments:

   381

   Kudos:

   3,111

   Bookmarks:

   595

   Hits:

   31,843

   Bookmarked by Canisaurid

   05 Jun 2026

   Bookmarker's Notes

   Probably the best grockdrian fic I’ve read to date T^T