This is all sans pov so yeah.....and how they feel when their frisk gone and how shock they are to see the original frisk is alive and then they where start seeing their frisk
Let start also their p.o.v will be alot so i have to slip somepart to the next chapter...

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Fell p.o.v
I was with mine sweetheart then like normal we were going to gribby like normal then i heard mine sweetheart
scream " Sans !!! What happening to me !?!?!? "
So i teleport to were mine sweetheart is. So i don't lose her forever
When i get there i saw mine sweetheart were glitching and fading so me and mine sweetheart check the board to see what wrong then the board appeard and is said frisk is being delete forever. So frisk turn to me crying but she just kiss me and and tell me how she love me and forgive her. Then i see everyone came to us and ask us what happening to frisk/ mine sweetheart when we told them they were crying and told frisk they will never forget her then she disappear forever.
Blue p.o.v
Me and frisk were going out with the gang
Then frisk ask me do you want to get some ice - cream. I said yes so we are going to get ice-cream to eat then i see carrot were talking to chara. And other were just talking...
Then i heard chara scream that something wrong is happening to frisk i turn around to see her start to disappear then appear like she were fading away. Then i ran to her and hug her while crying and told her to not leave. And she just " sorry blue i guess this is it heh.... "  ' No no no no no is not okay plz frisk plz stay with me babe plz... * sobbing * ' " Is alright blue take care of them for me okay ? "
Then she kiss me then i close mine eyes to open again to see her gone forever...... I start to scream  FRISK No nO NO No NO THiS IS nOT rEAL shE IsN'T DEaD then i start to pass out the last thing i heard were  " .... Sans!!!! ...Omg ... Is he okay !???! "
Nightmare and dream p.o.v
We just got our frisk back, you see when i/nightmare destroy our world we thought Frisk have die and frisk is our lover  be the way. Then one day, we were fighting eachother we saw someone were watching us then that person run. After a while we chasing that person, we found out it was our frisk. We were both crying cause we thought our frisk was dead. Now we are going out and we saw our frisk was glitching then we start to see our love start to disappear like someone want her to be gone
Then she just look at us then she hug us and give us her hair clip and her scaff to us then she gone
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Hey guys just to let you guys know that i won't write the other au's sans react to their frisk dead cause that too much work anyway bye guys ●︿●