Sooo, guess what? I'm back with more Undertale. :D I didn't plan for this, honestly. This whole idea was a spurr of the moment. I've been following a certain Sarah, also known as FireBird-Mutation on Deviantart, also known as ElectricSnowman on this website, for a while now. She, among other things, wrote an adorable fanfiction (and drew a comic based off that fanfiction, too!) where Maddy and Muffet started dating, and I don't know why, but I've really grown fond of the Muffy ship. :3
This story was originally supposed to be a one-shot for my Stories From Undertale collection, but seeing how long even the first part got as I wrote it, I decided it needs a file of its own. :D I hope ya'll enjoy it!

PROLOGUE: The Phone Call

The air was still filled with the energy of the storm that just passed by. No matter how long they've been on the surface, he was still having pretty tough time accepting that there was such thing as weather.

That being said, this mood of the world -the one right after a furious storm, when the raw nature's power was only beginning to slowly fade away -was somewhat peaceful to him. And that was saying a lot, considering he was the least peaceful being within a thousand mile radius. Perhaps his near constant anger depleated along with all the energy from above.

And on yet another plus side, snails seemed to love this kind of weather as well, emerging from above the wet grass and playing near the temporary puddles of rainwater. Maddy sat on a stub in front of Undyne's house and watched the little creatures crawl around with a rare smile on his cotton face.

It was a still, happy and quiet moment.

"HEY, PUNK!"

The ghost nearly jumped out of his dummy.

"WHAT!?" he shouted back and turned around. Undyne was approaching him with a cell phone in her hand.

"Muffet wants to talk to you," she said with a slightly annoyed expression. As she handed the device over to him, she quietly hissed: "Seriously, you're gonna have to get a phone of your own if you keep seeing this girl."

"Bite me," Mad barked back at her and took the phone. Within a fraction of a second, his tone changed completely.

"Uuuuh, h-hi?" he squeaked and blushed. Undyne who was on her way back inside the house snorted. The ghost sticked his tongue at her back; he was almost about to snap but he didn't want to yell when Muffet was on the speaker.

"Hi, dearie!" she said. "How's your day?"

"Um, fine, I guess," Maddy replied. "Just enjoying the weather. How are you?"

"Oh, I'm 'enjoying' the weather too," Muffet groaned. "I forgot that my bedroom windows were open, and now I have a small flood upstairs."

"Oh gee! Do you... do you need some help?"

"Nah, don't worry, I've got this. But thank you." She giggled. "But actually, there is something you could help me with."

"I'm all ears!" said Maddy.

"Weeeell..." Muffet started to explain hesitantly. "There's this shop in Atlanta, and its owner would supposedly really love to sell my pastries."

"Whoa, that's big!"

"Right? The thing is, I've gotta meet with the owner all the way in Atlanta. Aaaand... I need someone to watch over Finn while I'm gone."

"Oh." Maddy has only gotten to see Muffet's pet twice before, and one of those times were him kind of spontaneously taking Finn for a walk while his girlfriend couldn't exit work.

"It would only be for a day. And two nights. I'm leaving this Thursday evening and I'll be back on Saturday morning. Would you do that for me? Please?"

"But why me?" asked the confused and slightly scared dummy. "I don't excell at taking care of anyone."

"I trust you!" Muffet simply replied, making him blush again. "And Finn seems to like you, so it's a win-win," she added with another chuckle.

"W-well..." Maddy didn't know what to say. No matter how hard he was trying to hide it in front of other people, he really liked her and he was willing to do anything for her sake; on the other hand, though, he was afraid of being in charge of Finn for an entire day and a half. It wasn't that he disliked the monster-pet; it was the responsibility. Snails were simple animals and very easy to look after, but anything bigger, smarter and faster, he had no idea how to handle. Plus, were something bad to happen to Finn on his watch, he would never let himself forget, and neither would Muffet probably.

"Pleeeease," he heard her mewl imploringly into his ear. It was so adorable that he sighed and gave up.
"Fine, I'll do it. Just tell me all I'll have to know."

"Oh Maddy, you're the best!" Muffet exclaimed on the other side. "Don't worry, I'll tell you everything when I hand Finn over to you. Will you be home at five on Thursday?"

"I guess."

"Great! Thank you so much!"

"Don't mention it."

"So... I gotta go. I'll call you tomorrow, ok?"

"Ok. I'll be looking forward to it."

"Me too. Ok, bye!"

"Bye!"

Then, there were a few seconds of silence.

"You still there?" Maddy asked eventually.

"Yup," Muffet replied, and laughed. "I don't wanna hang up."

"Me neither," he smiled. "Just do it."

"No, you do it first."

"No, you hang up first."

"No, you hang up first!"

"No, YOU-"

"Oh no, you're NOT playing that game with MY phone!" Undyne suddenly shouted from the house and walked swiftly towards the dummy. "You have five seconds, then I'm taking it back."

"Try to stop me," Maddy cried back at her and ran away with her phone still by his ear. She began to chase him around the yard with various curses on her mouth while Maddy and Muffet kept on playing the "you hang up first" game.

"Wow," Alphys who was watching the entire scene from behind a window said to herself. "I've never seen Mad so playful and happy before."