5 days later ~
after 5 days (m / n) living together with frisk and the dreemur family he and his family are very happy to be able to gather like this.
(m / n) and frisk are always close as usual, (m / n) and undyne always do challenges and are always won by (m / n), and the friendship (m / n) and sans have become very close.
sans realized after their closeness that he had little feelings for (m / n), when (m / n) approached him, how (m / n) always smiled at him and how he was DETERMINED to protect everything.
that's why he always blushed when together with (m / n), he felt very comfortable.
sans then looks at (m / n) who is doing a challenge with Undyne again along with his papyrus brother, they are doing a challenge for how strong they are in lifting weights.
and of course always won by (m / n) and makes undyne and papyrus groan annoyed.
while (m / n) he just smiled as usual to make sans blush seeing that smile.
skip time [next day]
(m / n) POV
beep ... beep ... beep-
I pressed the alarm button irritatedly then I went back to sleep again then soon I started sleeping again suddenly the door to my room opened tight, making me startled and almost fell from my bed.
then I saw who opened the door "huh? frisk why did you wake me up this morning." I said tiredly.
"Did you forget that we will go to the garden together with sans and eat ice cream together !!" said frisk excitedly.
"oh? I guess he was just kidding about that." I said.
"No !! Now get up and get ready, sans are waiting for us outside." said frisk.
I widened my eyes to hear that sans had arrived first, then I fell from my bed making me moan in pain then I heard frisk laughing then they came out of my room, then I woke up shaking my head and then I went to the bathroom.
[ after taking a bath]
after finishing the shower I quickly put on my shirt and pants then I put on my colored jacket (f / c), then I put on my necklace in the shape of a star and a gift from sans.
somehow he bought me a necklace but I like the necklace he gave, after all I finished then went downstairs. when i go down i see sans and frisk who are laughing "looks like they are throwing a joke together." I thought with a smile.
then I went to the kitchen to make a bread for my breakfast with chocolate jam, after I finished eating my breakfast.
i then went munuju sans and frisk when we got there we immediately went out before going out i said goodbye to my mother and mrs. toriel that we're going to the park.
then the three of us went to the park with a 'shortcut' from sans as soon as the three of us arrived at the park, frisk immediately ran to play there while sans and I just sat in the garden chair chatting.
But I always noticed every time I smiled or laughed I saw sans cheeks turn blue "Does sans sick?" I thought worried.
"what's up (m / n)?" asked sans.
I looked at him worried "Are you sick sans?" I asked, worried.
"Huh! No, I'm not! I'm not sick." replied sans a little nervously.
"if you're not sick ... why is your face turning blue?" I said.
then sans cheeks turn blue again "he must be sick." I thought.

YOU ARE READING
Sans AU X M!Reader
Fanfiction(m / n) (L / n) is a 19 year old boy and he is frisk's cousin, (m / n) always looks after frisk like his own sibling because since childhood frisk has always been treated harshly by their parents. (m / n) always knew this since his parents visited...