Tanjiro came out of the box , as Zen looks at him . "Hey, Tanjiro! Did you sleep well?" He asks nervously as the demon boy looks at the boy curiously. 

"Oh, hey, Zen. I guess that you had a nice sleep too, right?" Nezuko asks him as the Demon Slayer was already woken up before he does as she was putting her sword away . 

The demon boy seems to be nervous of Zentisu as he hid behind his sister. 

Zentisu looks at the demon boy curiously as he asks, "Did I do something wrong?" 

Nezuko said, "I think you're scaring him a bit. I mean, it's the first time he encounter another human since he had been transformed into a demon. "

Zentisu seems to be curious of it, as he said, "Oh. I didn't know that would be the situation, I guess that he should've be more social with others. " 

"Well, he wanted to, besides, he still has the bamboo muzzle on his mouth, so, it's hard for him to speak. But I know he'll be able to get it off someday." Nezuko said, looking at her older brother. 

They sat down to hear the doctor who healed them to see if they were healed enough to continue their journey. 

He checks their heartbeats and final checkups as he smiles at them reassuring the group, "Well, it has decided. You are completely healed, so you can leave the Wisteria House. " 

Nezuko sighs in total relief to hear the news to hopefully continue to find the answer to turn her brother back to human form. 

Then right at that precise moment, Nezuko's crow fly into the house, to deliver them their next mission. 

"North-northeast! North-northeast! Your next mission is north-northeast! The three of you are needed at Mt. Natagumo!" 

The trio looked at each other in pure curious state, as they are not sure why they were needed at Mt. Natagumo.

The group turns around as Nezuko said to the caretaker, "We'll be leaving now. Thanks for the hospitality. I hope that we can visit you again soon enough." 

The caretaker have something she wanted to give to the Demon Slayers. "Here, this is for you." 

The trio didn't know what to say to her as they were unsure of what to do.

As they were about to leave, she sparks a lights to wish them good luck on their mission. 

Inosuke didn't take it all to well as he said, "What you think you're doing , you old lady?!?" 

He was about to hit her , but Nezuko and Zen immediately caught him before he can cause any more trouble . 

Nezuko grabs him as Zen said, "Are you completely dense?!? She's just giving sparks as a good luck charm, because we're going to be in a dangerous mission, genius! 

Be respective of her!" 

As night falls and near their destination, Zen fell to the ground, felt scared. 

"Zen, don't tell me. You're scared again, aren't you?" Nezuko asks looked at her friend in a pure embarrassment expression on her face. 

Inosuke laughs, "Ha! You're such a wimp!" 

Then all of a sudden, Nezuko sniffed the air, as she smelled something awful from the mountain.

"I smell something." She said. She went ahead as Inosuke follows her lead, as Zentisu said, "Hey, wait a minute! D-Don't leave me here!" 

It was too late as Nezuko and Inosuke already had left him behind to investigate the mountain. 

What they saw was a fellow Demon Slayer, bruised and on the floor. He noticed them as he said, "H-Help me." 

Nezuko said, "He's a Demon Slayer!" She ran up to him, "Are you ok? What happened to you?"

Suddenly, he was swept up, as the strings were attached to him as they flew him into the forest. "They're attached to me too! Help me!" 

Nezuko and the others gasp of what they had witnessed , as Nezuko smells the air once again, as she recognizes the smell so easily. She knew that she had to go in, to make sure that what she smelled isn't what she thought it was. 

"I'm going into the forest, you guys. " She said to them as Zentisu was shocked of her determination to go into the dark forest. 

Inosuke said, "Well, if you're going, I'm going too. This is making me having this sudden urge . I'm getting hungry." 

Both of them ran off, as Zen was still too afraid to go. 

Inosuke and Nezuko continue walking as Inosuke looked at his hands to see it was covered in spider webs! 

"What the hell?" He asks , looking at the webs as Nezuko was shocked and confused of it as well, as if she was wondering in her mind, "A Spider web? What's going on?"

Nezuko smiles a bit at the boy, "You know... I'm kind of glad you decided to go with me. The smell I had smelled earlier, I was scared a bit, but having you around, it calmed me down. So, thanks." 

Inosuke was shocked of her speech, as he was unsure how to respond to her. Then suddenly, Nezuko spotted someone. 

"Inosuke. Look." She said, as she pointed to another fellow Demon Slayer. They nodded at each other to go towards the boy to figure out what is happening inside the forest . 

She walks up to the boy as she touches his shoulder to get his attention. He was frighten by her , as she said, trying to reassure him, "It's all right. You don't have to be afraid of us. We're here as backup. I'm Nezuko Kamado, Rank Mizunoto." 

"Wait a sec. You're a Hashira? Why they send a Hashira here?!? No matter how many Mizunoto they send, it's useless!" 

Inosuke smacks the boy to knock sense into the boy , as Nezuko was stunned by his actions. "Inosuke! Dude, that was not cool!" 

The boy said, "The crow told us to come here! There were ten of us, ten Demon Slayers to come into this mountain. 

Not since it was long when we were inside the mountain, the Demons Slayers... 

They began to kill each other on the spot! I..." 

Nezuko knew it was unbearable for him to continue on as she knew it has to be a demon. 

Meanwhile, a crow manages to spread the word of what is happening. 

"Oh, it seems there is trouble. Gyiru. Shinobu . You know what to do . " 

"Yes." They said. Shinobu said, "It seems like the humans and demons are making trouble once again. We should get going." 

Gyiru didn't reply back to her as if she was annoying him. 

Both of them went off. 

Zen thought, "I wonder if they hate me. I mean , I act so cowardly in front of them, it was stupid. But would you leave your friend in the road like that?"

His sparrow was annoyed at his sulking , as he bit his hand, as he said, "Ow! Ok, ok! You're right! Wait a sec. Nezuko brought along Tanjiro, didn't she?!? 

Oh, no! What if the demons find out about him! I have to help them out now!" 

He sped up to find the other Demon Slayers on his own. 

Nezuko and the others hear a strange sound. "What is that?" She asks. The boy said, "That's the sound from earlier. When we came onto this mountain, we heard this sound!" 

Nezuko was amazed of this revelation, as she ask, "If that's true, then where is it coming from?"

A group of Slayers approach them with their swords as Nezuko, the boy, and Inosuke dodged their attacks. 

Inosuke said, "They're compete idiots! They know it's taboo to kill other Demon Slayers! They're acting strange!" 

Nezuko said, "Well, we can't hurt them, Inosuke! They're our comrades after-" 

He smacked her in the stomach as she groans from the attack, as he said, "There is more than meets the eye! " 

Nezuko finally gets what he was trying to say to her , as they teamed up as to protect the boy from the Demon Slayer was going to hurt him. 

Nezuko sniff as she thought in total surprise , "There's a sweet scent on his back! I wonder.." 

She took her sword as she slices the invisible strings on the boy's back, as she was amazed of her guess. 

She yelled, "It's the threads! They're the ones controlling them! That's why they started killing each other! "

Nezuko thought, "Where is the demon controlling them? " 

Then she caught an awful scent. "What was that? " 

She notices the spiders on her arms, "Spiders? " They begin to attach her as she quickly slashes the threads. 

"So, that means the spiders are connected to the puppet strings? That's reassuring. " 

The Demon Slayers got up as the Demon said, "Now , let's play, my sweet little dolls. " 

"It's no good! I can't pinpoint the Demon's location. Inosuke , if you have that type of power, use it quickly! 

I need to help..." 

"It's Murata! " He introduces himself. 

Nezuko continued, "Murata and I will handle these guys as much as we can! " 

They stopped as they looked up to see a Demon. 

"So, you're the ones who are disturbing my family's private life. " He said. 

He went away as Inosuke tries to fight, but he couldn't as he fell to the ground. 

"Inosuke! You have to focus! " Nezuko yells. 

"I know! I know! You want me to pinpoint the demon's location! I'm on it, just be patient! Beast Breathing Seventh Form, Spatial Awareness!" 

The breathing technique was able to locate the demon's location as Inosuke had found the location of the demon! 

"Found it." Inosuke said. 

The demon said , "I'm done fooling around. It's time to be serious for once. "