Here you go pal XD so shut up kay XD Multi_fandom123

BP eyes went wide hearing Sans word, meanwhile Frisk only can stare blankly at him...

"W-what do you mean? My... my true brother? "
"Yes sweetie... he miss you dearly"

Frisk sobbing quietly even if she doesn't know why... she felt that...it's true that she have true brother even if she can't remember it, but she miss him dearly... wait...where did he know that person is he?
The scenes become white...and she can hear a crying voice coming...

"SISTER!!! HELP ME... SANS IS MEAN TO ME AGAIN!!! "
"Gezz... Sans how many time i muat tell you, stop make a prank for my bro"
"Heh... can't help it sweetheart... i will stop if you kiss me"
"Gosh..you are silly"

The vision stoped and Frisk feel dizzy...but nothing can stop her to run and hug Sans...

"Please!! I wana meet him"
"But Fris-"
"Please bro!!"

BP sigh... he surely have a weak spot for Frisk and never can refuse her request...

"Fine..we can go tomorrow "

With joyful laugh..Frisk launch herself to BP who give her a small smile in return... Sans only can give her a wide grin, absolutely happy when he see his love back to her cheerful self once again..

But he didn't know...

tomorrow.... the quiet happy wind will turn to be blizzard...

Tomorrow comes and Frisk preparing her self to meet her long lost brother... and boy she feel so nervous... Sans told her that he will pick her up at 10 o'clock...
Frisk can't decide what kind of dress she must wear today, well she think this like her second date... ehem....just thinking about it make Frisk want to faint from happiness...

But then one dress caught her eyes, a beautiful white simple dress that reach her knees... how can she never saw dress like this on her wardrobe? Must be her bro who buy it for her... Frisk smile happily and wear that dress... the dress it's self hug her perfectly like it's belong to her and only her..she want make Sans proud to her....well but it's look like he already proud but oh well....

A sudden knock can be heard on the front door and Frisk almost fall because she want to open the door in panic....10 already? Why time flowing really quick when you are in rush?! Then when she slam the door open, she saw Sans who grining at her with love in his eyes... he wore a simple but formal clothes that suit him perfectly... but when his eyes fall to her dress his eyes went wide... and almost make her worried because he froze on the spot...

"Sans? You okay?"
"H-Huh? O-oh yeah Im fine...let's go sweetheart "

His grin come back and he hold her hands gently, taking her to walk beside him hand in hand...

"Do you mind if i don't use my teleport now...uh...i wants to stay like this longer"

Frisk blush and modded her head, Sans is really romantic guy...and Frisk feel so lucky right now to able to stand next to him.... shyly Frisk kiss him lightly on his cheek and gaining a dark blush from him..

"Gez..warning me next time if you want to do that!"

The walk is really fun to Frisk, it's doesn't matter that they aren't going to fancy place..just able to hold hands and telling each other joke is enough for them... and when they are reach their destination... both of them let out a small sigh of disappointed and laugh together....what a lovely day...

Sans hold a door handle and glance at her... Frisk doesn't know that she is sweating until Sans point it out and wipe it with a tissue...

"You ready honey?"
"Yeah..."

Sans open the door and let Frisk in, suddenly Frisk is filled with the sense of nostalgia... even if she didn't know why...

"ASRIEL!!! COME HERE PAUSE YOUR GAME AND COME DOWN HERE, SOMEONE WANT TO MEET YOU"
"WAIT A SECOND BRO!!"

A quite yell can be heard from second floor and Frisk heart beating faster... she know that voice... but...who?
A tall goat monster come out from that seems like his room, his clothes is messy and have a tired look on her face.... Frisk froze on the spot, like all black doots is being removed from her head...she remember.... and begin to cry....

"B-bro!! A-asriel!"

Her call and sob success to steal Asriel attention from Sans and his eyes went wide...

"S-S-sis!!! H-how!?"

Frisk run to him, and he doing the same, after many years they gone from each other life...they come back...and nothing can break this happy moment....

It's what they thinks......

Frisk stop huging Asriel who continue to cry and keep saying something so fast that Frisk didn't catch it at all... then Frisk look at Sans... a gentle smile on his face...and boy..how can she forgot her love even a sec...she love him so much that made her want to cry again... she........remember it all....
Frisk told Sans to come to her and join the hug, of course Sans didn't protest and join in.... he so happy...but something is not right here and that made him can't fully enjoy this moment...but what is it?

But...then Frisk head begin to hurting so bad that she must clench Sans jacket to support her...

"Hei?!! Are you okay?"
"Sis? What's wrong!!? "

Frisk head throbbing like want to exploded... she can't even answer their questions and the pain suck her to darkness and she faint... Sans ansd Asriel panick seeing her state and bring her immediately to Alphys...who see her with shock!!

"F-frisk!!!!"

Alphys bring her to a huge room where she lay on the white bed with a cable attached to her head and body...then when she come out her face looks so sad and make Sans and Asriel worried...

"How long you meet her Sans? "
"Uh... a month ago..."
"You...ugh...you must tell me sooner that you found her..."

Now Alphys is crying...

"W-why i must tell you?"
"Frisk is amnesia... because... we made her amnesia Sans!!! We the one made her forget all of this for her safety!! "

Wooooohooooo cliffhanger!!! Ha you want plot twists pal? I give you plot twist XD