Story includes: Fontcest, spoilers, fictional incest, violence , and language
Author's Note:
Hello! For this story, it contains spoilers for those who haven't played the entire game (including all the endings). In the later chapters, I'll explain the AU of the story since there are ideas I want to depict but may need explanations. This will contain spoilers and easter eggs that are found in the game. I've been researching about the game theories pertaining to Undertale to keep it as canon to the game as possible. However, in some cases, my ideas will deter from what Toby has in mind so I will dub it as AU when the time comes (because I realize some things get really complicated and conflicts with the canonical ideas). This is my first fanfiction! I'm so excited to make a series about my two favorite characters. Hope you enjoy the journey along with me! :)

disclaimer: I do not own Undertale. It belongs to Toby "radiation" Fox and Temmie

I want to give thanks to the creator of the game, my boyfriend who introduced me to the game ;v;, and lastly the fandom/community that share this love with the pairing.

Background: The story takes place after the True Ending where everyone is living peacefully on the surface for many years.

Prologue

Flowey, who stayed behind underground, looked above to the opening of the mountain where the sun shined and smiled a bit. For some time, he took the liberation to explore the underground seeing all belongings gone, taken to the surface with their designated monster owner. Buildings stayed, the weather underground: unchanged. He visited Snowdin after listening to the Echo Flowers, at Waterfall, to not feel as lonely and pretended the monsters were around. Feeling the cold sensation against his petals, he occasionally thought of wanting to end everything but he'd just be brought back with his determination. However, a visit from Frisk time to time made him feel better. Frisk would often wonder why Flowey wouldn't want to come to the surface with them. And with every time they asked, he would gently reply that he just couldn't let these golden flowers die without being taken care of. Another reason would be that, in case another human falls here, he can guide them back to the surface. Remembering Chara, shuddering at the thought, he couldn't let another human fall into the darkness.

He looked up to the biggest house in Snowdin; the skelebro's old home. With white puffs formed on walls and the balcony piled up with snow, it was no surprise as no one tended the house. In sheer boredom, Flowey decided he wanted to brush the snow off the balcony and roll around in it. Shoveling the snow from the door's entrance with his vine-like roots, he barged in as if seeking shelter from the harsh blizzard. Shutting the door, he glanced around. He sees some possessions still lingering on the floor. There were post-its and an old sock next to the furniture where specks of gray dirt indicated where the television used to be. Exploring the rooms, Sans's room was the messiest he's ever seen. There were still trash on his mattress and many piles of smelly socks scattered everywhere. Flowey wasn't even sure if he should walk around, not wanting to catch anything; though chuckling, he could just return to his former self if he does get "sick". He went across the treadmill, with a message taped onto the machine that said "If you find this note, feel free to use the treadmill. But there's sno-way you'd still be here. Try not to get snow-din while you're at it. ;)". Flowey stifled a laugh.

Reaching for the window, Flowey opened it to bring in fresh air. He peered outside and saw a door on the left. He wondered what was inside that room. Though, the room might have been cleared out if anything precious was in there. With curiosity, the golden flower crawled out the window and made his way down to the snow pile. Reaching for the door knob and turning it with his vines, the door opened with pitch black. Searching for the light switch he remembered there wasn't any light for anyone to pay it for. Face-palming, he searched for a flashlight. He finally found one at the Inn, thankful it still works, and explored the room to satisfy his curiosity.

He found papers and drawers…and a photo with Sans with other figures he wasn't familiar with. He then saw a purple cloth covering something. This looks really big. Dragging the cover, it's a machine. What kind of machine is this? Feeling the cold surface with his vines, he found that it was broken. There was a blueprint on the table, and a bunch of handwriting on a piece of paper that could be related to the machine; though it looked as if it was written in another language. Flowey decided to leave the room alone for he has no idea what any of these things mean.

Days passed, with rain, sunshine, and moonlight. He could smell the air of spring coming in. He suddenly heard a voice from above. Frisk came to visit! Seeing their face uplifted the tired golden flower's face. For many suns and moons passing by, Frisk's height had changed and their voice, slightly deepened that differed from a child's tone.

Flowey smiled, trying to fight back the tears and embraced the human with his vines.

"Frisk! I missed you! How is it at the surface? I was so bored haha." The human wasn't alone, however, a familiar voice sprung in the air that was cheery and energetic.

"THE GREAT PAPYRUS HAS ARRIVED ONCE AGAIN TO THE LAND THE KING ONCE CALLED IT HOME!"

"Oh, hey Papyrus…" Flowey greeted. "What brings you here?"

"WHY, I WAS THINKING YOU MUST BE HUNGRY SO I MADE YOU SOME SPAGHETTI!" Papyrus claimed excitedly.

"Heh, oh dear I don't really eat anything. I'm a flower after all. I just need water is all." Frisk looked at him and nudged. "A-ah but yes thank you Papyrus, I will eat it-!" Flowey smiled. Frisk whispered that Papyrus actually got better at cooking so his spaghetti is actually much more edible than the flower remembered. Flowey took a bite of the meat ball and nodded, tasting the tomato sauce then the noodles. "Not bad!"

"NYEH HEH HEH, I'M GLAD YOU ENJOYED IT FLOWER FRIEND!" Papyrus smiled.

Exchanging conversations about the surface life, Papyrus gave Flowey drawings and letters they did for the golden flower. Frisk explained before that they had the idea to keep writing him letters and send pictures to keep him company when they aren't there. Flowey always appreciated the thought and kept all them in a box at Asgore's house. The only ones aware of Flowey's existence was Frisk, Papyrus and Sans. He felt that the other monsters may see him as a threat after the stunt he pulled. Papyrus forgave Flowey and knew there was good in him and Sans trusted the human's judgment over the flower, though still a bit wary. Frisk absolutely hid Flowey's true identity to Toriel and Asgore as it may break their heart. Flowey, especially, requested this to not reveal who he really was to his parents that he had tried to kill. He was grateful that they have moved on with his death and are living happily on the surface.

Thanking Frisk and the tall one for the new set of letters and drawings, Papyrus stood and explained that he wanted to visit his old house. Apparently he was missing an action figure from his collection and was becoming restless on where it was. Both Flowey and Frisk nodded and remained at the Garden to exchange more conversation.

Author's note: There's the prologue! It's a bit slow but I promise you things will get exciting~ I hope you enjoy Flowey's life in the Underground