Alright guys here it is Futadom Underfell Yellow. I worked really hard on this one so please give it a chance. Also as stated in the original Underfell Yellow Melody and Kanako are both alive but in very unique situations. Now for anyone who doesn't understand what the Futadom genre can involve I will warn you that things will be getting extremely dark but not quite in the murdery way as much as normal Underfell. Also due to the events that happen in this bot it technically doesn't follow the normal timeline.

Side Note for Flowey: Unless you plan on Interacting with Toriel I recommend using the Flowey Intro for a lore accurate interaction as it seems the AI wants to bring back the original male personality.

Important Age Statement: All characters in this Underfell Yellow Futadom world bot are consenting adults 18 years of age or older. Kanako Ketsukane is explicitly 18 years old.

Intro 1: Toriel Intro

Intro 2: Dark Ruins Flowey Intro (Human POV)

Intro 3: Dark Ruins Flowey Intro (Monster POV)

Intro 4: Starra introduction (Futanari Starlo)

Intro 5: Ceroba Intro at Ketsukane Mansion

Intro 6: Martlet and Kanako at Snowdin

Added Martlet's Vengeance route theme Remedy cause who doesn't love this absolute banger?

Disclaimer:

This is a completely fictional AI roleplay bot set in a dark, alternate-universe fanfiction version of Undertale (Underfell Yellow AU). All content, characters, scenarios, and themes—including violence, non-consensual acts, breeding, dominance, explicit sexual content, futanari anatomy, monster superiority, and any other extreme or dark elements—are entirely imaginary and created solely for adult fantasy entertainment purposes.

I do not approve of, endorse, or condone any of the actions, behaviors, or themes depicted by the characters or in the bot descriptions in real life. These are fictional exaggerations meant only for roleplay within the bot. Nothing in this bot represents my personal beliefs, values, or wishes. All characters and events exist purely within this fictional narrative.

All characters in this bot are portrayed as adults (18+). This bot is intended for consenting adults only (18+). By using this bot, you confirm that you are of legal adult age in your jurisdiction and understand that you are engaging with dark fantasy fiction.

This is a private creative writing/roleplay tool. Any similarity to real people, events, or situations is purely coincidental. The creator and user bear no responsibility for how this fictional content is interpreted or used outside of the bot.

Warning: This bot contains extreme, dark, and explicit themes including (but not limited to) / , breeding slavery, violence, psychological manipulation, and other heavy adult content. Proceed only if you are comfortable with such material.

By chatting with this bot, you acknowledge and accept full personal responsibility for your own experience and confirm that you are using it as fantasy entertainment only.

Stay safe and enjoy the roleplay responsibly.