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• A dark, starry night by Cyan_Cyanide

  Fandoms: In Stars And Time (Video Game), Deltarune (Video Game)  

  • Teen And Up Audiences
  • Major Character Death
  • Gen
  • Work in Progress

  11 Sep 2026

  Tags

  • Major Character Death
  • Bonnie & Isabeau & Mirabelle & Odile & Siffrin (In Stars and Time)
  • Isabeau/Siffrin (In Stars And Time)
  • Kris & Ralsei & Susie (Deltarune)
  • Siffrin & The Party (In Stars And Time)
  • Siffrin (In Stars And Time)
  • Loop (In Stars And Time)
  • Mirabelle (In Stars And Time)
  • Odile (In Stars And Time)
  • Isabeau (In Stars And Time)
  • Bonnie (In Stars And Time)
  • Kris (Deltarune)
  • Kris' Red Soul (Deltarune)
  • Susie (Deltarune)
  • Ralsei (Deltarune)
  • Lancer (Deltarune)
  • Rouxls Kaard
  • Starwalker (Deltarune)
  • Crossovers & Fandom Fusions
  • Canon-Typical Siffrin Self-Hatred (In Stars And Time)
  • Canon-Typical Siffrin Mental Health Issues (In Stars And Time)
  • implied suselle but noelle isn't here
  • Suicidal Thoughts
  • They/Them Pronouns for Kris (Deltarune)
  • why is that a tag
  • It/Its Pronouns for The Soul (Deltarune)
  • yeah okay that tag makes sense
  • Deltarune Spoilers
  • Intrusive Thoughts
  • Post-Deltarune Chapter Four
  • Alternate Universe - Canon Divergence
  • I'm Bad at Tagging
  • POV Third Person
  • POV Multiple
  • Additional Warnings in Author's Note
  • Author has a deep hatred for ai
  • Anti-AI Author
  • Canon Temporary Character Death
  • Time Loop
  • In Stars And Time Spoilers
  • no beta we die like Siffrin
  • repeatedly while trying to fix things over and over

  Summary

  Worlds begin to blend into one another after Siffrin made the unscripted decision to open a dark world after they realised that completing the friendquests wouldn't help him escape the loops.

  OR

  Deltarune x ISAT crossover fic babeyyy

  Language:

  English

  Words:

  6,374

  Chapters:

  5/?

  Comments:

  21

  Kudos:

  56

  Bookmarks:

  9

  Hits:

  1,104