MC, who is with Tamayo and Yushiro, helped them in their blood arts and creating medicine when he and Tamayo San researched Nezukos blood and found something astonishing. Due to Nezuko's condition of sleeping to heal, Tamayo sees her as extremely rare and unique, since most demons cannot handle being unable to eat for two years.
Nezukos being unable to talk and the lower IQ of the child caused us some problems, but with our knowledge and intelligence, we came to the conclusion that her body is resisting muzan control and evolving into something else. This shocked Tamayo, and as for me, I know what is going to happen to her.
I created energy pills for her to recover fast with less sleep and pills for fastening her blood demon art. As for Muzan, we need the blood of Twelve Kizuki.
In the mean time, Tamayo and Yushiro become close to me like family, and I swear I will save them and make them human again. Tamayo explained her past to me, then I got back the suppressed memory of Tomayo, which made me cry a little, and she asked about Tanjiros ears. I asked why she told me about goat Yoriichi Tsugikuni, and man, I got another memory that made me pittiful, which caused confusion for both of them, and I told them about Tanjiros family history, which surprised them.
After saying my good-byes to both of them, I came out of the forest and called Garuda with the system. Yes, I made Garuda my partner so we could communicate without a problem. I asked him about the updates.
He explained the successful completion of the mission by young Tanjiro and his friends reaching the house with a Wisteria family crest, getting rest, and patching up. After they recovered, they were assigned a mission and informed they must head north-northeast to Mount Natagumo.
MC, Shit Garuda "When will they reach the mountain?" "By tonight, why, Master Rudra?" "They will be fighting Lower Rank Five."
Garuda "Nani, then we need to inform other hashiras to participate; otherwise, casualties will be devastating."
"No time for that; it will be too late, and I believe there are two hashiras on the spot already. I will reach there tonight."
Garuda "How will you reach there in such a short amount of time? It will take two days to reach."
MC "Leave it to me, and you reach there and follow Tanjiro and don't interfere in his battle; only observe and understand now for maximum effort." I ran like hell towards the mountain.
As night falls, the three reach Mount Natagumo. Zenitsu becomes frightened and sits on the road while Tanjiro and Inosuke question him. Zenitsu adamantly refuses to enter the mountain and asks if they don't feel creepy vibes from it as the trio stares at the dark forest-riddled mountainside. They ignore his words, and Zenitsu claims they are being abnormal for not being scared. Tanjiro suddenly detects a scent and runs off; Inosuke follows, and Zenitsu eventually gets up to join them.
They find an injured Demon Slayer begging for help but witness him suddenly pulled back into the forest, yelling out, "They were attached to me, too!" as he is abducted. Seeing this, Zenitsu becomes more frightened, but Tanjiro senses the demon scent again and is now motivated to enter the forest. Inosuke then cuts him off by claiming that he will lead and Tanjiro can follow. They run into the forest, while Zenitsu remains at the forest's border, unwilling to continue.
They find an anxious-looking Demon Slayer, and Tanjiro claims they were sent as backup, then introduces himself and his Mizunoto rank. The Demon Slayer doesn't find comfort in this and claims they should have sent a Hashira instead, stating that adding Mizunotos is pointless. Inosuke suddenly punches him in the face and claims that his existence is pointless instead, criticizing him for his fear.
Elsewhere, an exhausted Kasugai Crow has reached a man in a shrine and informed him of the massacre. He wonders if they will find the Twelve Kizuki on the mountain and decides to send some Hashira. Behind him are Giyu Tomioka and Shinobu. As they acknowledge his decision, Shinobu asks Giyu about whether demons and humans could get along; Giyu only retorts that it is impossible as long as demons eat humans.
Outside the mountain, Zenitsu and the sparrow fight, and he criticizes the bird for not being cute, pointing to Nezuko as an example. Suddenly, he remembers that Tanjiro had taken her along and is now in the mountains, motivating him to enter the forest with fury.
Mean while Tanjiro He then looks down his arm and sees two white spiders. Something from a distance manipulates the threads they form, pulling Tanjiro's arm, though he cuts them to free himself. He sees the spiders scurry away and realizes they are the ones attaching threads. As he looks up, he sees the freed Demon Slayers under control again. A white female demon is responsible, wishing to control them till their arms and legs fall off and calling them her dolls. Tanjiro declares that cutting the threads will be pointless if they're reattached anyway.
He asks Inosuke if he can pinpoint the demon's location but is stalled by the Demon Slayers continuing to attack him. With the demon scent continually appearing, his sense of smell isn't helpful now. Tanjiro and the lone surviving Demon Slayer, Murata, continue to hold their attackers off until he suddenly sees something.
High in the trees, treading on a web of threads, a pale child-like demon appears. It threatens them with staying away from their family's peaceful life.
Inosuke, having heard his instructions to find the demon, stabs both his blades into the ground, crouches down, and spreads his arms. Using Beast Breathing, Seventh Form: Spatial Awareness, he scans the forest to search for the demon, detecting trees, vegetation, and the landscape far around him. After looking hard and long enough, he finds a demon sitting atop a boulder in the distance to his left. Atop his webs, the pale demon declares that he won't let anyone get in their way: "The five of us are going to live in bliss as a family," as he draws a spiderweb in his hands.