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1. HOTLAND-ESC SUMMER by ThePUNisher

   Fandoms: Deltarune (Video Game), Undertale (Video Game)  

   • Explicit
   • No Archive Warnings Apply
   • Other
   • Complete Work

   24 Sep 2026

   Tags

   • No Archive Warnings Apply
   • Deltarune Player/W. D. Gaster
   • W. D. Gaster & Deltarune Player
   • W. D. Gaster/Reader
   • W. D. Gaster & Reader
   • W.D. Gaster/The Angel
   • corestrings
   • W.D. Gaster (Deltarune)
   • Deltarune Player
   • Deltarune Player (The Angel)
   • Reader Insert - Character
   • Reader
   • W.D. Gaster (Undertale)
   • Corestrings - Freeform
   • Alternate Universe - Canon Divergence
   • Survey_Program
   • Device Theory
   • Inappropriate Use of the Device
   • Building Upon Device Theory
   • W.D. Gaster in Deltarune is from Undertale
   • Reader-Insert is the Angel
   • Inconsistent Form for W.D. Gaster
   • Multiple Descriptions of W.D. Gaster's Form
   • W.D. Gaster's Form is Based on Player Perception
   • Description of The Depths
   • Mentions of dreams
   • Every Copy Of Deltarune Is Personalized
   • Every Copy of Deltarune Has a Unique Version of W.D. Gaster
   • (they're splinters of himself that spread across the device after he shattered)
   • Messing With Fiction and Reality
   • Fiction and Reality Sloppily Makeout
   • Long Distance Relationship Across Dimensions
   • Fluff and Smut
   • Smut
   • One Shot
   • POV Second Person
   • Summer
   • Reader Lives in Apartment Alone
   • Reader's AC Broke
   • References to Undertale
   • References to Hotland
   • Cosmic Horror/Cosmic Horror
   • Pre-Established Relationship
   • Drawing
   • Stripping
   • sweating
   • Nipple Play
   • Voyeurism
   • Recording
   • Porn Tape
   • Sex Tape
   • Masturbation
   • Pubic Hair
   • Vaginal Sex
   • Vaginal Fingering
   • Inappropriate use of a water bottle
   • Technically Sex Toy?
   • Hand Jobs
   • Blow Jobs
   • Yet Another Inappropriate Use of a Water Bottle
   • Using water as lube
   • Yearning
   • Begging
   • reader is freaky and insecure about it
   • but its okay gaster matches their freak
   • Gender-Neutral Reader-Insert
   • reader has vagina
   • Reader Has Penis
   • no beta we die like gaster
   • kinda corny writing im ngl
   • forgive me if the humorous bits take you out of it a little
   • I cannot help myself
   • NO AI - MADE WITH REAL HUMAN HANDS

   Summary

   Heatwave be damned, you wanna jork your shit in front of W. D. Gaster.

   Language:

   English

   Words:

   9,803

   Chapters:

   3/3

   Comments:

   4

   Kudos:

   55

   Bookmarks:

   1

   Hits:

   550