[A/N: It's been a while, everyone. I just made this another chapter out of boredom but I will think about making more stories if I have time.

By the way, thank you for supporting and reading the works I hope you always support me.]

(Y/n) was with her father, Muzan. They were so delighted and laughing as if they celebrating something.

Until (Y/n) turned her back, witnessing the upper moons dying. She saw the uniform of a Demon Slayer from the person who killed them, her body was trembling.

She looked back to Muzan and saw him coughing blood. Then, somebody just beheaded him. "DADDY!" (Y/n) yelled while tears were falling. All of the surroundings were black.

"I didn't regret adopting you. I love you, sweetheart" Muzan said smiling.

Suddenly, she got up on the bed, and tears were streaming down her cheeks.

"What's the matter?" A familiar voice asked.

(Y/n) turned around and it was her father who lay beside her, she hugged him immediately. "Having a nightmare?" the girl just nodded. Muzan hugged her back and kissed her forehead while (Y/n) just crying.

"No matter what nightmare that is, I will always be protecting you"

"But you will all gonna be killed! The upper moons and everyone." (Y/n) stated.

"It's just a dream. Remember? I'm immortal so I can't die" Muzan comforted his daughter until she fell asleep again.

* * *

The next morning, she went to the kitchen, as usual, to spend the morning with the upper moons. But none of them were there beside her father. "Good morning sweetheart" he greeted.

"Morning. Where's everyone?" she asked while sitting on his lap.

"They all went out. I want to spend this morning together. That's why–" he stood up and serve her [favorite breakfast] "I tried to cook your breakfast"

(Y/n) eyes sparkled as she saw the appetizing food. "Itadakimasu" She grabbed the spoon, having a scoop then shoved it in her mouth and enjoyed it very well. Meanwhile, Muzan patting her head while she enjoying the food.

Later on, she went to her friend's house Kuroo. Well, she was accompanied by the other demon the reason was, Akaza was on a mission.

'Why would Muzan-sama made me accompany this weak ass human? I guess I just dropped her somewhere as soon as possible. I want her to disappear in front of my face, she's so annoying' the demon said.

Normally, Akaza would drop her in front of Kuroo's house but with this demon, he dropped her in the middle of the street which was quite unusual for her. 'Now, I have to walk all away there by myself'

(Y/n) continued to walk to Kuroo's house. When she arrived there, she knocked but no one answered. She knocked for the third time but still, no one answered the door. "He must be still sleeping"

She decided to surprise him but when she opened the door she saw three people lying on the ground with blood everywhere. Which made her eyes widened because those three people are Kuroo's parents and Kuroo himself.

"Y/n... R-un pl-ease" Kuroo said while slowly losing his consciousness. She approached him immediately. "Who did this to you?" she asked with a sad tone.

"L-eave please. ."

(Y/n) held his hand while tears streaming down on her, also remembering how her mother dies. "Please don't leave me. You promised that you will marry me! I've been waiting for that to happen"

"I love you, (Y/n)"

Those were his last words before he died. (Y/n) started to cry out loud. "Me too, you rooster head"

* * *

"That's was so adorable child's play" A stranger appeared with a demon beside him.

The little was so scared, she cannot move her body. She was just shaking. "A human, again a human how dare he is," she said to herself

"Thanks for the meal that you gave me, my human friend. As your friend–" the demon stabbed and choked the human death "You will be joining them" His attention went to (Y/n).

"Pl-ease spare my life! I. . am Muzan's daughter!" she yelled.

"How dare you to use his name. A weak human like you can't be his daughter" He replied while slowly approaching her.

"I AM TELLING THE TRUTH"

Before he gets closer, his head were suddenly on the ground. A green- checkered haori was seen before (Y/n) passed out.

[A/n: I'm sorry if this is short but I will make a continuation of this. It's late night here so I have to go to bed.

By the way, thank you very much for reading and voting]