Oh, come on, we all knew this one was coming

(Y/n): Your Name
(S/c): Soul Color
(N/n): Nickname, if you don't have then ignore it

Fandom: UnderTale
Characters:
-Sans, the last (in genocide run) and hardest boss to beat. Skeleton who likes puns and being lazy. Your boyfriend in this
-You, Sans' girlfriend/boyfriend, generally you.

Stuff to know:
-You've been in the Underground for a long time and have made friends with every monster, you haven't met Asgore just yet
-Toriel came with you and acts like a mother like she normally does
-I'm an idiot in writing fluff

And most importantly...

I DO NOT OWN ANY CHARACTERS, UNDERTALE AND SANS BELONG TO TOBY FOX, YOU BELONG TO YOU. I ONLY OWN THE PLOTLINE.
__________________________________

Walking through Waterfall, hand in hand with your lover, you lean your head on his shoulder. Luckily he was just that tiny bit taller than you so he rests his head on yours, he leads you to an Echo Flower field and sits down beside a river, watching you run around the blue flowers.

He took out a small black velvet box and opened it for a bit, gazing upon the ring he wanted to give you. "I hope she wants to...," he thought to himself.

"Sans!" The human called the skeleton, gaining his attention, she ran towards him and put an Echo Flower crown on his skull, each of them saying sweet nothings, like "I love you!" Or "It's all Ok!" Luckily, Echo Flowers don't copy one another, so they all said their own things.

"thanks, (y/n)...," he gives you a genuine smile and pecks you. Red dust spread across your features as you felt his "lips" on your cheek.

Sans decided on bringing up a topic, "what do you think of marriage?"

"I think it would be great...! Always being together...and having children to raise...," this time, he blushed. (Y/n) realizes what she just said, her face now flushed with red as she quickly retorts, "I-I mean if y-you want kids...t-that is...!! Wait, no, I DIDN'T MEAN IT LIKE THAT!!"

"calm down..., it's ok..." Sans hugged you close and ruffled your hair. "though...I DO want kids...," he adds, emphasizing the "I do", making your face flush more.

"so..., (y/n)..., will you spend the rest of forever with me?" He took out the small black velvet box and opened it, revealing a beautiful ring.

______________________________________

The choice is yours! Wow, it took me half a year to update this...so uhh...bye