Nezuko said, as she runs, "I really hope that Inosuke wouldn't do something stupid, because if he does, I'm going to kill him." 

She thought, "Hey,  if what is she said was right, I might have to get a blood sample from that demon, in order to change Tanjiro back into a human! " 

She found the boar Demon Slayer who was waiting for her. 

She notices of the blood cuts he has all over his body, as she was concern about it. "Hey, Inosuke! You ok?"

"Yeah, I'll be fine, don't worry about me, for crying out loud! Did you manage to kill that demon that was controlling the Demon Slayers?"

She nods, "Y-Yeah, I did . But seriously, how you feeling with all those bruises on you?" 

"Like I said, I'll be fine! Don't show pity and kindness to me!" He said. She had it so, she pulls out several bandages to cover up all the cuts as he was trying to deny her hospitality. 

"Knock it off!" He said, as she said, "Just hold still, you big dummy! It's going to be easier to do if you stop moving." 

Meanwhile, Zen was trying his best to locate the group. "Geez, the forest is giving me the creeps! I can't find Nezuko and Inosuke in this forest! 

And the smell is so damn smelly I can't stand it! And this place is filled with spiders, c'mon, give me a break!" 

He notices there was spider with a human face, terrified by its appearance, he fled. 

"Why on earth is there a spider with a human face?!? It's too creepy!" 

When he came to a stop, he notices something that surprised him. It was Demon Slayers hanging in a thread, and surrounded by a house. 

He thought in his mind, "What the hell? Are those humans being turned into spiders?!? How is that even possible?!?"

Zen saw a spider coming towards him, as he thought, "He's huge!!!!" 

He tries to flee , but the spider demon laughs at the Demon Slayer, "It's no use of trying to run. You already lose the moment you step into this place. " 

Zen turns to the Demon , "What you talking about?!? I don't like guys like you, any day!" 

"You know what your situation is, boy? Take a look at your hands!" The demon said. 

The Demon Slayer did as he suggested, by his total surprise, he was poisoned by the spider's venom! 

"It's poison . You were bitten a while back, I assumed? That poison has the ability to transform you into a spider yourself. " The Demon Spider explains to the Demon Slayer. 

Zen was already terrified as he fled up to a tree branch, as he said, "Shut up! Shut up! I don't want to hear you!" 

The Demon said, chuckles at his prey, "It's quite natural to be afraid. Once the poison settles in, you'll lose your intelligence . " 

"Be quiet!!" Zen said. 

He had a decent flashback when he was living with his Grandfather, who was training him to become a Demon Slayer. 

"Get down from there , this instant! You'll not going to accomplish anything from crying and being scared all the time, Zenitsu!" His Grandfather said. 

As unexpected, a thunderstorm appears of where Zenitsu was and his grandfather saw him being struck by lightning. 

"Zentisu!" He calls as the boy was falling from the tree. 

Zentisu was scared by the fact he was about to transformed into a spider, that he was knocked out completely. 

The demon spider was confused by the boy's appearance. "What's up with this guy?" He said. 

Suddenly, he was breathing mid air, as he was ready for an attack formation. 

He said, "Thunder Breathing, First Form." 

He remembers his grandfather's words, "Well done, Zen. You master one move, it's quite extraordinary. If you can master one move, hone it to perfection. Hone it to unless potential!" 

He felt the power within himself, as he knew exactly what he has learnt from his grandfather's harsh training. 

"Thunder Breathing, First Form, Thunderclap and Flash! Sixfold!" He cried, as he used the attack head on, in a flash , and it so fast that the demon was unable to predict where he was attacking from. 

As to his amazement by the boy's skill, Zen was able to slash the demon's head without him noticing it by his own sword. 

The demon thought , "Impossible! Did I get slashed , by him?!?" 

The demon vanished , but for Zen's condition was far more serious . 

He was unable to move , due to the poison and it was painful for him. 

He hears his grandfather's voice, "Don't you ever give up, Zentisu!" 

He knew he has to keep on living, he has to. 

"I can't give up just yet. Use the breathing technique as much as you can to slow down the poison in your body. 

Even it is painful and agonizing , Gramps would absolutely reprimanded me for sure. 

Also, Nezuko wouldn't like it either if there is nobody to help her protect Tanjiro. "  He thought. 

Nezuko hears something as she turns around in a puzzling expression of where the sound was coming from. 

"What was that? Did a lighting just struck right now?" She asks Inosuke if he knew where the sound was coming from. 

"How the hell I know? It's not my problem. " He replies as she sweats from his reply as if that was really assuring her . 

As Inosuke was about to cross the lake, she said, "Um, Inosuke? I think we should go this way, to find the demon." 

To their amazement a girl demon was in front of them, as Nezuko thought as she was about to unleash her sword, "A demon! It is because of the odor wafting all over the mountain, it's no wonder I couldn't pick up a scent until now! " 

Inosuke said, "Hey, you demon! I'm going to rip you to shreds! " He chases after her as Nezuko sighs at his actions as she has to follow him. 

"Wait! Inosuke , wait for me! " She said. 

Then she yells, "Father, now!" 

Inosuke asks, "What does she mean by "Father" ?" 

A huge demon appears in front of him as Nezuko was afraid of him being there all by himself without any plan to defeat it. 

"Inosuke!" She cries at him. 

The demon came as both Demon Slayers were terrified of the demon's appearance. 

The demon yells, "Don't go near my family!" 

The Demon Slayers back off from the attack as the girl demon said, "I'll leave the rest to you, Father." 

Nezuko thought, "How we going to defeat this demon?!?"

Inosuke was about to be attacked, but Nezuko yelled out, "Water Breathing, Second Form! 

Water Wheel!"