Few days passed by, Ryuu had taken the Demon Slayer corp to join them, letting him meet Kanao. They surprisingly get well together along with Aoi. He could somehow feel that there was chemistry between them.
He knew Tanjiro would end up with Kanao one way or another but thought it would include Aoi. Ryuu thought he might be the one who influenced him but shook his head.
Ryuu had told everything to Kagaya and explained his reason for letting Muzan escape, making him appreciate Ryuu's consideration and was shocked that he knew about his family relation with Muzan.
"Few months from now, it's best to prepare every Demon slayer as we will go on an all out attack." Ryuu said.
"How can you be certain that he won't try to escape?" Kagaya asked.
"Muzan is a coward through and through. He would likely hide and prepare for our arrival knowing it's futile to run. Furthermore, he is too arrogant to let me go and would plan to take his vengeance."
Ryuu's reason was acceptable despite the possibility the demons would increase dog him but the fear that he made Muzan experience would make him reckless and likely make his demons stronger by pouring more blood.
In the end, Kagaya only nodded as Ryuu finished his business and went back to the dimensional room to help Kie and Nezuko acquire their magic.
He left Tanjiro to train and experience how to become a demon slayer. Not to mention, the day was final selection and I wonder how things went.
[ A/N: Just read 'The purpose of my existence' where Tanjiro did the final selection but only Kanao was there. ]
Ryuu returned to see the children playing with video games and watching some television. They've spend exactly few weeks inside due to the time difference and they've quickly adapted to their new environment.
"Yo kiddos! Make sure to stop playing and do your task okay?" Ryuu said.
"Nii-san you back! Kaa-san told me to inform you that they are in the garden."
Hanako received a pat from Ryuu who warned them to do their task which was school work that he made for them. He never expected to become the thing he swore to destroy.
But Ryuu made sure to not spoil them since he is afraid that everything is getting in their heads. Though, he doubted that his lifespan could be compared to a human but still wanted them to be independent when the time comes.
Afterward, left the children of their own accord and headed his way to the garden. He arrived to see Shinobu having a spar with Mitsuri using their magic.
They were amazing at handling their magic with Shinobu using her poison at close distance. Mitsuri tries her best to create distance as she is unable to use magic when her opponent poisoned the magical energy around her. Ryuu walks his way to Kanae who notices his presence and welcomes him.
"How did it go?" Kanae asked, giving a quick peck.
"I already told Oyakata-sama about the preparation. A few months from the day all Demon would be annihilated." Ryuu said.
"That's great news! Finally the long battle against the Demon has ended." She said.
"But our journey hasn't. I'm still happy that you all chose to be with me." He told her.
"And we have no regrets."
Ryuu smiled hearing her words wrapping his arms around his ways gripping her ass making Kanae slightly moan. One thing he had learned is that she was a massive Masochist and pervert.
"That's why I like to hear from you, my kanae~" Ryuu smirks.
"Ara~ aren't you growing bolder? Well we should do it later and pay attention to Kie and Nezuko."
Kanae pointed towards the two who were medidating trying to sense magical energy in the surroundings. He had already unlocked their Aura which was a lot easier than acquiring magic.
Ryuu used his [ Byakugan ] to see if there's anything wrong but only saw the rapid churning of magical energy around them that was terrifying compared to Mitsuri. It was unbelievable fast that they were close in acquiring magic.
"A-Amazing! They're absorbing magic at a rapid pace!!" Ryuu exclaimed.
"Wait, are you saying that they acquire magic faster than Mitsuri?" Kanae was perplexed by this.
"I don't know but that's what I'm seeing. Hold on, let me observe much longer."
He inspected to see the reason why they were absorbing magic at a rapid pace and hoped there wasn't anything wrong.
'What could be the reason? Their bodies are clearly human but why?'
Ryuu was baffled at the mystery and used his mind-related skills to conclude an answer. It only took him a brief moment and found the answer far faster than expected.
"Now, I may know the reason why they absorb magic much quicker than Mitsuri." Ryuu said
"What would it be, Ryuu?" Kanae curiously asked.
"It's because their fate had changed that most plans shifted."
It was the only reason since Nezuko was supposed to have power anyway and Kie should have been dead therefore the only conclusion is fate shifted that better suits the world. Kanae was confused since she isn't aware of the concept of cause and effect
"Well long story short, their misfortune turned into luck or some sort."
Now the plot change meant that most luck was focused on Nezuko and Kie rather than Tanjiro. Though, it's still possible that he still has plot but not so much.
Then the sound of explosion could be heard in the distance and saw Mitsuri along with Shinobu increase their power even more. Third, clothes were already tattered from all the fighting.
'I wonder if there's a way to get close to nerve damage? Like a dress that connects with the soul and just fixes itself like a divine dress.'
Ryuu thought about the future since he doesn't have to reach divinity and have his authority to influence the world. He once read fanfic with this scenario and wanted to do the same.
'My own Pantheon harem huh?'
He would be delighted at the thought and already look at his harem before shaking his head.
'That's early for that. For now let's focus on getting stronger .' Ryuu thought to himself.
"This time I'm sure to defeat you! Remember our bet!"
"Whoever wins gets to sleep on top of Ryuu."
Mitsuri cried out while Shinobu mentioned their bets, making Ryuu worried since they could get out of hand and it did as the two flared their Aura that affects a small radius at that moment Ryuu recalled about Mana Zone from black clover which was Mini domain or weaker version of Reality marble.
'I maybe I could ask Gojo to teach me how to do domain expansion.'
Ryuu would want to learn reality marble but it's far too complicated that he would stick with basic until he advances. He was some sort of prodigy anyway.
"Be careful you two!"
He returned his attention towards the two as they started to get more intense. Shinobu hair radiates a dark miasmic purple aura while Mitsuri has a soothing light pink aura.
Ryuu used [ Shundō ] to intercept the two as a cloud of smoke was pushed back and envelope the entire area. Kanae uses her magic to protect the two girls who are still busy meditating.
"Ara~ now the two are going to it."
Kanae giggled seeing how Ryuu held the two with chains of blood attached to their weapon and body while Ryuu spread his blood to attach the poison, compressing it before crashing the blood poison into dust.
"Ryuu, Your back!? How was it?" Shinobu said.
"*Sigh* you two were so engrossed in fighting that you forgot that Kie and Nezuko are close by!" Ryuu told them
"I-I'm sorry..." Mitsuri apologized.
"No, it's fine. I was just worried that you two would get overboard again."
The two were embarrassed from their reckless action and apologize once more upon seeing the ground destroyed.
"Putting that aside, you two are getting stronger! Shinobu, your poison has become more potent and your control increases so that it immediately poisons my magic blood."
Ryuu wasn't poisoned due to his Aura protecting him but the poison was too strong for his aura to keep going and had to use magic to remove the remaining poison.
"Mitsuri, your use of fairy has increased and turned them into weapons and limbs."
He mentioned the hovering particle that Ryuu had to use his blood needle to destroy them. Ryuu is relieved that he interfered since they could seriously harm themselves if it weren't for him.
"Thank you, Ryuu. But do you have any more suggestions for my Poison magic?" Shinobu asked.
"Maybe search for other world series and base some poison on it? Like poison that ages or slow perception of time." Ryuu said to her.
"Oh that could work!"
Ryuu nodded, recalling a scene from Bleach where one of the villains experienced a time where time was slow to the extreme that the villains thought was to just die.
"Hey hey what about me Ryuu!?" Mitsuri asked.
"Since it is a particle that can be solidified then try replicating Lucy from Elfen lied but I warn you now since it is quite sad and gruesome." Ryuu told her.
"Alright, Thank you, Ryuu!"
He nodded then sensed an influx of magical energy toward Kie and Nezuko that made him smirk.