You woke up,swinging your legs of the couch and stretching,not the most comfortable place to sleep but you'd had worse

You walked over to the windows and opened the curtains,you then went into the kitchen,made a cup of tea,and sat down at the table,only then did you hear the creaking sound of a door behind you

"WHO THE FUCK-WAIT A SECOND,ARE YOU THAT HUMAN THAT HELPED ME HOME LAST NIGHT"

"Yeah,actually"

"WHY DID YOU DO THAT,FILTH"

"I don't know really,maybe Because it was a nice thing to do,plus you looked like you needed the help"

"OH,WELL,THA-WAIT A MINUTE,THIS IS JUST A HUMAN TRICK ISN'T IT"

"No"

"THEN WHY ARE YOU BEING SO NICE TO ME"

"Because I'm a nice person? I guess,and I want to be your fr-"

"I WILL TAKE YOUR SOUL,HUMAN,BECAUSE BEING NICE HERE IS ALWAYS A MISTAKE"

YOU KNOW WHY? ITS BECAUSE IN THIS WORLD-"

undyne pulls out her spear and you enter battle mode

"-ITS KILL,OR BE KILLED"

The fight begins,she throws a spear at you,you dodge and give her mercy,refusing to attack,this seems to confuse her,this same process repeats a few times before she gets frustrated,she turns your soul green and you now have to face all attacks head on

You hold up your shield you had summoned and tried to block her attacks,all the while you kept showing her mercy

After a while of doing this she asks you a question and your answer makes her stop dead in her tracks

"WHY WONT YOU FIGHT BACK,WHY WONT YOU KILL ME"

"Because mercy is the most honourable thing you can give to anyone"

"...HOW SO..."

"Well,if you spare those who are powerful or interesting then later on they could prove to be great allies and maybe even...friends..."

By now she had stopped throwing attacks at you and the battle had ended,she walked up to you and says something unexpected,she asks you...on a date...

"A date?"

"WELL,YEAH"

"When"

"RIGHT NOW!"

"Here?"

"YEAH"

"Okay"

She walks you over to a table and the two of you sit down in an awkward silence,you couldn't think of anything once you were seated either,after the occasional comment and few attempts at small talk,all of which failed tremendously,you notice a piano in the corner of the room,
...bingo!...

"You play?"you say,gesturing over to the instrument

"YUP,WHAT ABOUT YOU,CAN YOU PLAY THAT"she points to the guitar strapped to your back

"Yeah,wanna try a duet,you play piano,I can do guitar and sing"

"SURE,IVE NEVER HEARD A HUMAN SING,IM CURIOUS NOW"

She sits down at the piano and you sit on the couch,She begins to play and you start to sing...

[There should be a GIF or video here. Update the app now to see it.]

Once the song was over you both look at each other with a look of accomplishment,then undyne suggests cooking some food,you were about to ask what but noticed she had somehow already mad the ingredients appear out of nowhere and you were making spaghetti,apparently...

you walked over to her and she brought out the chopping board,now you were making the sauce

"NOW HIT THE TOMATOES LIKE THEY WERE YOUR WORST ENEMY"

You thought of Tracy and filled with rage,you pounded those tomatoes so much that their grandchildren would feel it,Wait a second,their tomatoes,they don't have grandchildren,never mind...

"YEAH YEAH,NOW THROW THE NOODLES INTO THE POT,BUT FIERCELY!"

you grabbed the box of spaghetti and slammed it into the boiling pot,cardboard box and all,making the water slightly splash over the edge onto the floor but thankfully not hitting you or undyne

"NOW STIR THEM"

you stir the spaghetti

"HARDER"

You stir them faster

"HARDER!"

you stir them even faster

"HARD-UGH YOU KNOW WHAT I'LL DO IT"

Undyne then made a spear appear out of nowhere and stirred so hard that she had also told broken the pot from...hitting it?...I mean stirring...

"OKAY NOW TURN THE HEAT UP"

"Okay"

"HOTTER"

"Uhh sure?"

"HOTTER"

"If I do it any hotter it's gonna burn the food"

"I SAID HOTTER"

You reluctantly turn up the heat again,you hear it sizzling out of control and steaming,then it began to smoke

"HOTTER"

"but it'll b-"

"HOTTER"

You turn up the heat one more time and the fire begins to spread out of control

"AHHH TOO HOT,TOO HOT,RUN!!!"

You both rush out of the now burning house

turning back to see her home engulfed in flames,undyne get mad at...you?

"YOU BURNT MY HOUSE DOWN,WHO WAS I KIDDING,I COULD NEVER BE FRIENDS WITH A HUMAN"

"you were the one that-Ugh come on undyne we don't need to fight,plus,we were having fun there at the beginning,weren't we?"

"WELL...YEAH...I GUESS...BUT WHERE WILL I LIVE NOW"

"I would offer you my place but I don't have one,I'm staying with a friend in her small apartment in the capital,actually I left flowey there and I never told them where I was going so I should probably get back there"

"ITS FINE,I ACTUALLY HAVE A...FRIEND...YEAH,FRIEND IN HOTLANDS SO WE COULD TAKE THE RIVER PERSONS BOAT THERE,I CAN PROBABLY INTIMIDATE THE. INTO LETTING US IN THE BOAT AND TAKING US TO HOTLAND"

"Really? Okay let's go then"

Her plan worked and once you were in Hotland she offered to hang out with you again,you agreed,hoping her house would be fixed by then,she assured you that the flames would die down quickly due to it being in waterfall,you sighed in relief,said your goodbyes and made your way back to the capital...

Temskip brought to you by the temmies:

Once you had arrived back at the apartment you knocked on the door,you heard a clattering and muffled voices before the door opened to reveal all three of your new friends,cashew,pitter and flowey...

"(y/n)!"

"Sorry I left without telling you,I went to a bar,met a friend,and helped them home,I then spent the rest of the night and today at their house"

"Okay,just don't be running off on us again"

"Heh,sorry"

You all go inside and eat some food since you didn't end up getting to eat that Satan spaghetti you and undyne had made,after dinner you all went to bed wondering what the next day would bring you...