A large figure wearing gold armour with a purple cloak draped over it sits amongst a sea of yellow flowers, they rest their chin on their fist as they contemplate the situation at hand. This is King Asgore, a Boss Monster in charge of overseeing everything in his underground kingdom. He had white fur covering him, a goatlike face with blonde hair, and an average length beard.

Asgore sighs, "Is this the correct way to go about it?" he ponders to himself, wondering if his actions thus far had been acceptable, morally and rationally. He had personally killed the six human children that'd made it down to the underground and stored their souls, there was only one more left to collect until he could absorb them and become powerful enough to free his people... Only now that was useless, he had elected to use the souls to empower his people in preparation for the menace that threatened them all...

Another human child had breached the underground, only that this time they did not act like those that'd come before them... They targeted monsters, hunting them down until there were none left to find, his Royal Scientist Alphys had shown him the recordings of it, and they were as heartbreaking to watch as he'd thought.

The doors to the room open as a small figure walks in, they have their pockets in their jumper and a smile plastered across their face...

Asgore watches as the skeleton approaches him, wondering what he could want. "Have you returned to reclaim your job as the Royal Scientist?"

The skeleton shakes their head, "No, working myself down to the bone doesn't suit me." he says with a wink.

...

Asgore shakes his head, "I miss the time when you didn't keep telling the same jokes, Sans." he says with a chuckle.

Sans shrugs, "What can I say? I've always been humerus..."

Asgore "Forgive me Sans but I've a lot to think about... Do you need something?"

Sans nods, "A change as finally occurred."

...

Asgore "A change?"

Sans "Yes, a change. An outside influence..." he presses.

Asgore "I'm sorry but I don't quite understand your meaning..."

Sans shakes his head, "If this wasn't so serious I'd say you're getting under my skin... No, what I mean is that THIS time it might finally end."

Asgore "Are you okay? Perhaps you should sit down and have some tea, maybe all the bad news is getting to you."

Sans nods, "Sure, just remember tea goes right through me, maybe I just don't have the stomach for it..."

Asgore "Really now, you're just being lazy with those jokes of yours." he says as he stands up from his throne to go prepare some tea.

Sans chuckles, "What can I say? Coming up with new material makes me bone-tired."

Elsewhere :

A child wielding a knife walks across a bridge but encounters something weird... The entrance to the Hot lands are gone? No... Collapsed. This is different... And ever so exciting! This must be that new character that they encountered, the one with cat-eyes and the two waifu's behind them.

Is this a new expansion? There wasn't any update?... Must've unlocked a hidden character! THE FIRST! Oh, I must explore this!

The child moves forwards and examines the collapsed entrance, discovering that it'd take a while for them to even begin to clear this...

What's this c.r.a.ppy mini-game? Moving rocks? AH! IT DOESN'T MATTER, I MUST SEE WHERE THIS PATH LEADS! I AM DETERMINED TO FIND OUT!

With that, the child begins slowly s.h.i.+fting rocks. The task is laborious and will take days of work to complete but they do so regardless.

Back with Reima, they'd began to ride a large elevator that goes incredibly high... He wondered if they'd still be in the underground when they left it but, sadly. They still were. Though the temperature was a lot cooler now that they were away from the lakes of lava.

Undyne huffs "Ah, I hate that place." she mutters as they step out of the elevator.

From there Alphys and Undyne lead the group through some sophisticated looking traps, a room completely covered in webs and then a huge building that Alphy's calls "Metatons resort"

They walk inside and Reima takes a look around, grinning at what he sees. "This looks like vacation material."

Alphys "You are still thinking about a vacation as monsters are slaughtered left and right?" she quickly asks.

Reima "Er, yeah..."

She shakes her head, "I'm starting to regret asking for your help." she mutters as they make their way through the resort and into an elevator labeled "CORE". Going through that and a couple more elevators takes them to an elaborately designed entrance to some room, going inside reveals the pitch-black interior with a single robot inside. They look like a box with a single wheel, arms with many lit up b.u.t.tons...

Alphys "Mettaton? Are you guarding the entrance?"

Mettaton "OH YES!" they exclaim, causing Priscilla to jump in surprise. "If the human manages to destroy everything then where would my viewers and ratings go!"

...

Mettaton "Ahem, I mean... I wish to save everyone." they correct themselves not long after their slipup.

Reima "As cool as a real talking robot is, isn't talking to Asgore kinda important?"

Alphys quickly nods, "Y-yes! Excuse us Mettaton, we have important matters to attend to!" she says and quickly walks past the robot.

Mettaton "Don't mind me darling! I'll protect you all from the human! I promise!"

As soon as they all reach the next room Reima leans over to Alphys and asks, "Did you design the robot to act gay?"

...

Alphys "No! And what's wrong with being gay anyway!"

Reima "Nothing, just thought it was weird to create a gay robot..." he mutters.

Alphys "Well, Mettaton isn't a complete robot. It's just a robotic sh.e.l.l surrounding a monster."

...

Reima "So it's the monster version of Ironman..."

Alphys shrugs and continues leading them, not knowing what an "Ironman" was.