Neon Moon—Chapter Five

by taitofan

Rated T for sexual situations

Disclaimer: I don't own Undertale or its characters.

Author's Note: This is the end of this fic, but that doesn't mean there won't be a sequel…!

If you have any CC, please share and I'll listen. Please read, review, and enjoy! Finished 11-22-15

"Your plot," Sans repeats slowly, feeling rather dumbfounded. Mettaton looks between the brothers, not seeming fully convinced that Papyrus knows what he's doing. Papyrus though—oh, Papyrus! His brother can't look more proud of himself if he tried. "You planned this?"

"Sans, your infatuation with Mettaton was very clear from the beginning! At first I was afraid that you hated Mettaton for some strange reason, almost as if you didn't trust my judgment of his character! But I quickly ruled that out. After all, I know you have more faith in me than that!" Sans chuckles, hoping his guilt isn't as obvious to Papyrus as his infatuation apparently is. Papyrus doesn't seem to notice though, and he turns to Mettaton with a warm expression. "I love Mettaton with all of my being, but I love you just as much! So when I realized your true burning passion for Mettaton, I knew what I must do!"

"He asked me to come over and try those little stunts," Mettaton continues as Papyrus laughs at his genius. He looks a bit more confident—it suits him far better, Sans thinks. "I couldn't say no… I didn't want to! Darling, I can't lie and say I wasn't excited at the thought of being with both of you. So if you'd like—"

"We may share!"

Share. Sans feels as if he could laugh—probably until he cried—but for many long moments he can do nothing but try to accept this turn of fate. All of that worrying and guilt and self-loathing and Papyrus wants to share. And Mettaton likes the idea.

"Well… I can't say I saw this coming." He wears his typical lazy grin, despite how dizzy he feels. It's finally hitting him—Mettaton wants to be with him. He feels like some kid with their first crush, and he supposes there's a lick of truth to that. He's far from being a kid, but he can fully admit that romance has never been high on his list of priorities. But Mettaton has changed his opinion on the subject, if just a little. "Sharing, huh…"

"I was correct in my assumption, was I not?" Sans nods slowly and Papyrus laughs happily. "But of course! The great Papyrus is always right!"

Mettaton turns his soft smile to Sans—it's so genuine, so unlike the arrogant grin he wears for the camera—and the magic in the air seems to tingle. God, why is this robot so captivating?

"I take it this means you'd indeed like to join us?" Sans wants to say something along the lines of 'You bet your sweet metal ass I do,' but all he can manage is a silent nod. "Then I'll be sure to make you just as happy as Papyrus and I are."

Sans, for once, lets himself believe that a happy ending is truly within his grasp. After all, Papyrus is an excellent judge of character, and he refuses to forget that again. Perhaps he could have skipped some of those painful nights if he'd just come clean to his brother in the first place. Well, what is done is done, and he knows he can only move forward from here.

"…Would you say you'll make me happy a Metta-ton?"

The mood lightens considerably as Mettaton begins to giggle madly and Papyrus all but shrieks that this isn't the time for terrible puns, though his grin tells Sans that his brother secretly approves. Sans decides that this atmosphere is something that he could get used to.

This is one golden ending worth fighting for.

Sans waits for Papyrus to return home from his sentry duties by watching TV. Mettaton—in his boxy body—wheels across the stage from the kitchen set he's been working at. All throughout the hour, he's made sure to incorporate more trivia in the show, and Sans knows that far more cooking questions are making it into his quiz show. It's such a little thing, but it makes Sans smile all the same, and Papyrus had almost started to cry when he'd realized it.

"That's all for tonight, my beautiful fans!" the televised robot announces with his usual pizzazz.

"Are your fans as beautiful as me?" Sans jokes, leaning into Mettaton's humanoid body. Mettaton smirks and places a kiss to Sans' cranium.

"There are many things I'd call you, darling, but I'm not sure beautiful is one of them. You're handsome, but I'm the beautiful one." Sans can't disagree. "You know, not that I mind watching myself light up the stage, but maybe we could wait for Papyrus some other way…?"

The implication is clear, and while Sans has found that actually acting on his fantasies is far more work than simply thinking about them, it's one bit of physical effort he's willing to exert himself on. A bit. Thankfully, he knows from experience that Mettaton doesn't mind doing most of the hard work.

"You gonna rattle my bones?" he asks as a hand slips between his ribs and begins to touch him ever so gently, teasingly. Sans shivers and leans more heavily into Mettaton, more than willing to let him take the lead and do as he pleases.

"Oh, darling, I'm going to do so much more than that."

Mettaton has done well to live up to his promise, and as Sans lets himself get lost in Mettaton's expert touch, he can't help but think that he has a really cool brother for letting him in on something as great as this.