His Only Weakness (Demon Slayer x Reader)

Family

A/N: Hello and sorry for not posting for a while. I've been really busy and have been really stressed out lately. I'm happy that I was able to post!

I arrived home late after talking to Tanjiro for hours on end before sending him to the Butterfly Estate, so I was surprised when I saw an Upper Moon demon along with Muzan waiting for me in my house.

I let out a small yawn. "Tea?"

"No." Both demons say.

"Suit yourself." I walk to my kitchen and make myself some tea while both demons follow me. "I never got your name, Upper Moon Three. My name is Y/N Himorogi."

"I'm Akaza."

I nod my head then turn to Muzan.

"I'll be right back, I need a change of clothes then I can begin my chores. You better do something productive with your friend here before I kick both of you out of my house."

Akaza's eyes widen at my threat towards his master before he lunges at me. "Don't threaten Muzan-sama." I dodge his punch with ease before throwing my kunai at him with the wisteria coating. "My house, my rules, Akaza-san. Surely you can understand that." I say as he becomes paralyzed from the wisteria on the blade. I walk past him and go to my room to change into my western style clothes.

When I come out of my room, I see both demons with some blood on their clothes. "Tch." I click my tongue before tossing them some kimono I put my patients in.

"Where those and put your clothes in the basket over there." I walk out of the house and into the garden.

Muzan POV (Omg my first ever POV switch!!)

After Y/N walks into her garden, Akaza looks at me in disbelief before walking off to a room to change. I put on the yukata she gave me as well before putting my clothes in the basket.

"I can't believe you let her talk to you like that Master. She's weak."

"You do not decide my decisions for me Akaza. I brought you here so that you can meet her. If any harm comes to her while you are around her, there will be problems."

We walk into her garden and Akaza looks around. "How is her garden so big and colorful?"

"Unlike you, she works hard to take care of it and-" I'm cut off by someone screaming.

"MY GARDEN!" I look at Akaza and run to Y/N avoiding any flowers.

Y/N POV

When I get to the part of my garden where I grow lavender, I see all of the flowers trampled and destroyed.

"MY GARDEN!" I smell the scent of two weaker demons and a child around here so I run into the forest surrounding my house and find a little girl , who looks about five years old, curled up in the corner with scratches all over her arms and legs while two demons fight in front of her. I throw two of my poison tipped kunai at the demons, as I run to the girl. The demons crumble to dust and I pick up the girl. I hear footsteps behind us along with the scent of demons so I throw two more kunai at the scent.

"Wrong person Y/N-chan. It's us." I turn around and see Akaza pulling the kunai' s out of his skin while Muzan walks up to me. I look at the girl in my arms.

"Hello, sweetie. What's your name?"

"S-Sakiya" She mumbles into my shoulder. Based on the way she is dressed and how skinny she is, I assume that she was abandoned by her parents.

"Sakiya, can you tell me what happened?"

"Those men chased me into a flower field then began fighting over me saying something about eating me." She begins crying.

"Shhh, it's okay, dear. Those mean guys are gone now. Do you have parents?"

"N-No."

"Okay." I continue to sway side to side while comforting her. The fact that both Muzan and Akaza are present doesn't enter my mind. I begin walking to my house and grab my first aid kit. "Is it okay if you come and live with me? I can take care of you until we can get you a family. Okay?"

Sakiya nods in my hold and flinches in pain when I clean her wounds. After I finish dressing her wounds and changing her into a sleeping yukata, I pick her up and lay her down on my futon.

"I have to do some work. I'll be right back." I brush her hair away from her face and stand up to walk away. As I leave the room, I hear her say something.

"Thank you. . . Mommy."

I smile then close the door.

"How's the girl?" Akaza asks.

"She's fine. I just put her to bed. She's probably shocked and exhausted. However, I need to replant some lavender seeds because of your stupid subordinates."

I grab a shovel then walk over to where I saw the trampled patch of flowers and begin planting the seeds that I could find. After that, I begin tending to the rest of the garden before harvesting some fruits and vegetables. I get back to my house around midnight so I begin washing the clothes covered in blood. Muzan comes up behind me, almost scaring the shit out of me.

"What are you doing? You don't have to, I can just get a new set."

"No. I'll do it. I hate it when rich people say that they can just replace something. Not everyone is privileged enough to do that. I used to be one of those people who they took advantage of until onee-chan married Kagaya-kun."

He nods. "The sun is rising. Do you mind if Akaza and I stay with you for the rest of the day before leaving at night?" "

Go ahead. Also, do me a favor. Don't eat any people in my town. We are a tight knit community and when someone dies, we all mourn for them." Again he nods before walking into the house to a room that is closed off from the sunlight.

Once I finish washing up the clothes, I hang them up before going into my room and falling asleep on a futon that I pulled out because of Sakiya sleeping on mine.

Taisho Secrets:

-Akaza and Muzan thought that you would be the perfect mother when they saw you with Sakiya

-Akaza now respects you because of how strong you are

-You swore to kill anyone who ruins your garden again