FNF vs Koishi (Heartly Paranoia)

Rating:4.2 (94 votes)
Released:May 11, 2026
Technology:HTML5 (Unity WebGL)
Platforms:Browser (desktop, mobile, tablet)

A Rhythmic Clash with the Subconscious

Get ready to face off against one of the most enigmatic characters in theTouhouuniverse! InFNFvs Koishi (Heartly Paranoia),BoyfriendandGirlfriendfind themselves in a surreal musical showdown againstKoishi Komeiji, the hidden subconscious youkai. This mod brings a fresh challenge to Friday Night Funkin’ with its unique theme, atmospheric visuals, and four original songs to test your skills.

Story: A Mysterious Encounter

The adventure kicks off when Bf and Gf are strolling through the streets at night. Suddenly, a ringing phone booth catches their attention. As they approach, someone unexpected appears — seemingly with the intent to startle them. What follows is a mind-bending battle of beats and wits as Koishi steps in for a rhythm duel like no other.

Tracklist: Groove to the Unknown

This mod features a set of challenging and uniquely composed tracks that bring out the personality of Koishi and the dreamlike world she inhabits:

  • Heart Stirring
  • unknown-x
  • Hartmanns
  • WTF

Each song offers a different flavor of rhythm and challenge, making this mod a must-play for any FNF enthusiast looking to dive into something a little more...unconscious.

Gameplay and Features

FNF vs Koishistays true to the core FNF experience with some added flair. The mod introduces custom animations, themed UI elements, and a prologue that sets the eerie tone. The difficulty curve is well-paced, making it suitable for both newcomers and seasoned rhythm gamers. Whether you're here for the music, the mod’s unique style, or the thrill of a new challenge, this one delivers.

Mod Credits

This mod was brought to life by a talented team who put their heart into every detail:

  • Nebits: Main Developer
  • Tepho: Menu Art, Thumbnail Art, Loading Art, and Mod Trailer

If you enjoyed playing this mod, consider supporting the creators on their social platforms. A like, follow, or share goes a long way in helping modders continue their amazing work.

Original FNF Credits

We also tip our hats to the original minds behind Friday Night Funkin’:

  • ninja_muffin99– Programming
  • PhantomArcade3kandevilsk8r– Artists
  • kawaisprite– Music
  • Kade Dev– Kade Engine
  • And all the contributors to the open-source project on GitHub

Play Anywhere with Web Optimized Port

Want to enjoyFNF vs Koishibut stuck on a low-end PC, Chromebook, Mac, or Linux? No problem! This web-optimized version ensures the game runs smoothly across various devices, giving more players the chance to groove to these beats — no .exe file required!

So, are you ready to take on Koishi in a battle of rhythm and reflexes? Step into the unknown and let the paranoia begin!