"WHO SAY YOU COULD DO THAT YOU TRASH!"
.
.
.
Sans and Frisk startled by the guy who angrily come to them. He wearing a formal clothes so he must be pretty important person in this area.

"Don't touch my belonging TRASH!"
"what...? yours...?"
"Yes!! you deaf! she is mine!! I'm the owner of this place, hand her to me now!"

He failed to notice that Sans voice is dropping to dangerous rate, even people around them begin to move away from that place. Frisk grip his jacket, trembling. She hide her face inside his hoodie and she curl into a ball. Sans left eye burning with a blue flame as he glare at him.

"Why...? why did you say she was yours? who the f*ck are you?"
"Ha..!! it's not surprising that someone low as you don't know about me! I'M REY! I'm very rich and famous that i can buy your entry being and dump it to the trash can! and yes she is mine! and she agree with that! she even give me a signature in the documents!"

He wave the documents in front of Sans face who stare it in disbelief. He still can't believe that Frisk signature that, with gently voice he pats her in calming manners as he question her.

"Is that true?"
"N-no he trap me, he said if i want to be friends with human... i must write something on that paper... so i did"

Her voice come out like a whisper but enough to make Sans blood boiling with rage, but he have to hold it... this freaking human have something that very dangerous for him and Frisk 'I must destroy that documents! or Frisk will never be free'

"WHAT ARE YOU WAITING FOR TRASH, GIVE BACK THAT BI*CH TO ME"

Sans angry when he call him trash but you know that hell will broke loose when that guy dare to call her like that.... but still he have to hold it.

"Hun, I'm sorry but i must give you to him this time, but believe me... i will find a way to destroy the documents.. wait for me kay?"
"Okay..."

She give him a weak smile as he teleport her back inside the aquarium. Seeing this Rey smirk, mocking Sans. He then call the guard and they drag Sans out of that place but before Sans completely out of that room, he turn his head back to Rey. The white pupils in his eyes already gone and than he give him a dark grin that make Rey shiver.

"Careful with your words pal... you don't want your bad time come sooner don't you?"

And with that Sans get thrown to the street by the guard. Sans went home with the frown clearly showing on his face, he even not bother to fake his smile. He slammed his doors and sit on the sofa with huff, still can't get over with it. Papyrus is innocent but he not that dumb to not knowing his bro mood.

"What happen bro?"
"Nothing paps"
"Don't lie to me please brother"

Papyrus not usualy talk with low voice thats meant he is really concern with him right now. Sans give him a heavy sigh and tell him everything, even Paps look like he wants to kill someone.

"WHO DARE TO DO THAT TO HER!? I WILL DESTROY THAT DOCUMENTS IN FRONT OF HIS FACE!"

With that Paps dash leaving Sans who have a sudden headache.
'Please don't tell me he went to Undyne'