THE BEST DAY | demon slayer

day 1

it was a dreamless sleep-- no nightmares, no dreams. just empty, peaceful sleep. muzan was in the infinity fortress every minute, not bothering to return to his human family or search for the blue spider lily. the demon king was waiting for the young child to wake up from her deep slumber.

demons didn't need sleep so he was intrigued as to why y/n was sleeping.

nakime was curious as to why her master had brought a mere child into the infinity fortress. she didn't ask the demon king, in fear that he would end her demon life. she kept her thoughts minimal to avoid the demon progenitor from asking her about it. instead, she observed the girl's movement in the room that muzan had laid her in.

"where... am i?"
y/n asked, taking in the unfamiliar surroundings. she didn't mind it though, she was sleeping in a western styled bed, the comforters bringing caressing the skin of the girl. the soft cushion made y/n want to catch for sleep but she had to figure out where exactly she was. glancing at her fingernails which were now razor sharp, y/n thought; i am a... demon?

just then, the door opened to reveal the same pretty man that saved y/n's life. y/n's eyes widened at the man's frame. his face held no sort of emotion, rid of any feelings. his plump red irises was what y/n thought made him extremely unique.

"you are awake."
the man stated the obvious, standing by the door, observing y/n's actions. her body was still stuffed under the soft, white covers, only her head peeking out of the bed. any lovable parent would gush at that scene but for muzan, he held that same still expression.

"hello... mister."
y/n greeted, she got down from the bed carefully, to not fall and bowed down at the man as a form of thanks. she was grateful to him for saving her life in that cold winter.

"i am kibutsuji muzan, the demon progenitor. we are at the infinity fortress."
y/n tilted her head at his words, she didn't understand what 'progenitor' meant and the name 'infinity fortress' but she thought that it was a cool name. the words were too big for her to understand but that's alright.

"thank you kibutsuji-san."
y/n had a flowery aura around her, animated flowers appeared as she smiled at the demon king who was rather confused.

BA-DUMP.

muzan felt his heart beat against his chest.

what is the meaning of this?
the man thought, going closer to the child, his actions got the best of him.

picking her up quite gently, y/n smile brightened at the contact that the man had initiated. she likes the hugs that muzan would give her. she felt way taller too since she could see whatever was happening below. y/n's small arms wrapped around the chest of muzan as she watched his face relax. it was no longer tense or still. it had a tinge of serenity and peace on it.

that was when muzan had decided, she will be living with me and by my side. i'll... protect her.

he had changed his curse to allow her to speak of his name when he offered his blood to her. y/n didn't know that. instead of the curse causing death, when y/n spoke of his name, she would be summoning him.

༊*·˚

walking out of the room, muzan brought her to the different rooms, introducing them to her. y/n was specifically interested in the science-y room where there were a lot of test tubes and colourful liquids. then, muzan showed her his room, where there was a bed but he explained that he didn't need it, since he didn't sleep.

y/n was kind of confused as to why he didn't need sleep but she figured out that it was perhaps due to the fact that he was a demon.

"do i need sleep?"
y/n asked the man curiously, since she was a demon after all.