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1. Sword Art Online: Tethers of the Heart by Phenix497

   Fandoms: Sword Art Online (Anime & Manga)  

   • Mature
   • No Archive Warnings Apply
   • F/M
   • Work in Progress

   23 Oct 2026

   Tags

   • No Archive Warnings Apply
   • Kirigaya Kazuto | Kirito/Yuuki Asuna | Asuna
   • Kirigaya Kazuto | Kirito/Kirigaya Suguha | Leafa
   • Kirigaya Kazuto | Kirito
   • Yuuki Asuna | Asuna
   • Kirigaya Suguha | Leafa
   • Hosaka Carina Tomo | Argo
   • Alternate Universe - Canon Divergence
   • Alternate Universe - Harem
   • Harems
   • Slow Burn
   • Canon-Typical Violence
   • Emotional Hurt/Comfort
   • POV Multiple
   • Cousin Incest
   • Butterfly Effect

   Summary

   On the day Sword Art Online becomes a death game, Kirito prepares to survive the only way he knows how: alone.

   But this Aincrad will not follow the path it once did.

   A determined rapier wielder refuses to let him disappear into solitude. An information broker from his past remains somewhere within the floating castle. And beyond the digital divide, Suguha refuses to let go of the boy trapped on the other side of the screen.

   As small choices become promises—and promises become tethers—the future begins to shift. Lives meant to be lost may yet be saved, and bonds that never had the chance to form may grow into something more.

   A canon-divergent, slow-burn Sword Art Online AU about survival, love, and the people who refuse to let Kirito face either world alone.

   Language:

   English

   Words:

   13,331

   Chapters:

   8/?

   Comments:

   52

   Kudos:

   25

   Bookmarks:

   13

   Hits:

   706