Twice Critical is a common Sacred Gear that doubles the power of the user for a certain time' is what Naruto knew about the Sacred Gear. It is considered an inferior version of Ddraig's Boosted Gear.
Naruto saw the upcoming events with interest. He knew Kuroka was not out for the count yet as he could sense a small build-up of Senjutsu in the surroundings. As Ivon moved closer, a purple mist started forming around the area.
"What? You can still move. I'll kill you" yelled Ivon and moved closer to Kuroka as the Sacred Gear doubled his speed and strength, he managed to slash her across her waist.
"Kekekekeke. Now I'll see how you'll move" said Ivon and watched in glee as Kuroka started to limp.
"Yes, yes. Just like that. Come, I'll show you heaven" he yelled and soon he approached her and tried to catch her hair only for her to vanish into mist?
"You think I'm down? Foolish Devil. Now face my wrath" came the voice of Kuroka and a blue fire light Ivon.
"No, no. Stop. I can't breathe. I feel like I'm being burnt. Mercy, mercy" he pleaded only for all his pleas to fall on deaf ears as Kuroka intensified fire and burned him alive.
"Nya. That was difficult" she said aloud and sighed in relief. She heard a clapping sound and turned in the direction to see a blonde man walking towards her.
She felt his power and even in her weakened state, she felt the unlimited power from the man. 'Is he God?' Was the thought of Kuroka when she saw him. She felt a burning sensation and looked at her hands which were burning with green fire.
"Senjutsu?" She asked, confused. Contrary to what people may think in this world, Senjutsu can be used to heal as well and as a master, Naruto knows how to heal with Senjutsu.
"Yes. That was a well-thought strategy" appreciated Naruto. She got a brilliant idea and asked him without hesitation.
"Hmm, ok. You feel strong. I want babies. Make babies with me" she asked him bluntly. Naruto didn't expect that but replied nonetheless.
"Babies? Now. Nah. I'm currently enjoying myself and when I get interested in them, you'll be the first woman I'll call" he said nonchalantly. Kuroka didn't expect that. But agreed with it either way as she doesn't have any other option or strength in her to argue.
"I'll be leaving then. I can't rest as you saw I have a lot of enemies" she said and was about to go when Naruto stopped her.
"Kuroka Toujou, SS-class stray Devil. 2 bishop pieces. Am I correct?" asked Naruto. This sent a chill through her body.
She can estimate Naruto's strength from the level of mastery he had in Senjutsu and that spelt one thing for her, trouble. She responded quickly by jumping back, creating some distance between them.
"What if it is?" She asked in a serious tone.
"Nothing. Just got curious" said Naruto nonchalantly. This caught her off guard. 'He is changing colours faster than a chameleon. I can't get a good grasp on him' thought Kuroka.
"Hungry?" Asked Naruto. She denied. But her stomach grumbled making clear that she was hungry.
"Do you like Ramen?" Asked Naruto with a smile and offered a cup of freshly cooked Ramen he got from somewhere. She took it and observed it doubtfully.
"If I wanted to kill you, I would have done it while I was healing you. Now eat. It won't be good if it went cold" he said and started eating from another cup. She also dug in and asked for another serving. She ate 10 full servings and gave a satisfied smile after that.
"Nothing is better than a hot Ramen in the belly," said Naruto, patting his belly. Kuroka agreed with that.
"Care to share your story now?" He asked and she shared everything without lying or hiding the truth.
"So from what you said, you were accused of killing your master. But you killed him because he tried to experiment on your sister. You escaped and now they found you and we are here" concluded Naruto.
"Nya. If you put it so bluntly, I guess that's there to it" grumbled Kuroka.
"Can we make babies now?" She asked in a hopeful tone.
"No. Didn't I tell you I'll call you when I want to? Why are you obsessed with babies anyway?" He asked curiously?
"I am a Nekoshou, a special variant of Nekomata. We are said to be high-level Youkai species capable of mastering both Youjutsu and Senjutsu. You can say we have a special talent for them.
Our race is on the brink of extinction right now as I and my sister are the only 2 known to me. I'm trying to make babies so that we can grow back our previous numbers" said Kuroka sadly.