Luck is his greatest point~!

With the creation of the condom, nothing could stop him anymore, and Kie, who was the only woman by his side, could only succumb to his strong desire. 

Fortunately, after a few days of staying at the hotel, Isao decided to move to a new house in the western villa in Yokohama as he didn't want to interrupt other guests' breaks. 

Kie only obediently followed him, but she was happy secretly since she really couldn't bear the proprietress and female employees of the hotel, who often came to her, wishing to help her burden taking care of Isao. 

Of course, she rejected all of them since it was her duty to take care of him, and she also knew that she had received a responsibility to stop any vixens that came in his direction. 

Yet, with the creation of a condom, she also felt that it was okay if Isao wanted to sleep with others as his safety was guaranteed. In her opinion, his happiness was number one, so even though sometimes, it was shameful, she mostly agreed to all of his requests; he often asked her to play in the kitchen or did a role play such as becoming a mother of his friend, who had been neglected by her husband. 

Being neglected, her heart was cold, then being passionately confessed by a handsome and heroic young man like Isao, naturally, her heart became fiery, and when they were together, they were just inseparable, blazing hotly, like an inferno. 

Still, while their days were nice, Isao didn't indulge in them. When he had finished taking care of his matters in Yokohama, he returned to Tokyo, especially when he had decided to take care of Nezuko, helping his stepdaughter become human again. 

Naturally, Kie was happy, and she knew that she hadn't chosen the wrong man, but at the same time, she didn't want him to be tired, and she often was the one who moved when they held each other. 

'Next time, let's make stockings!' 

Isao thought as he saw Kei's plump, sexy thighs that moved lewdly as her mature pussy devoured his young cock. 

Still, even so, he didn't forget his purpose in this world, which was to become stronger. 

While it was true that he wasn't in a hurry to get Muzan, especially after he had gained Muzan's DNA, so he had been training all of Muzan's abilities, trying to get used to this demon king's abilities. 

During his stay in Tokyo and Yokohama, Isao had been training hard, and he definitely didn't use all of his time to sleep with the mother of the protagonist. 

He swore! 

At the same time, he comforted Kie, who was still in pain after what had happened before. As a good person, wasn't it normal for him to comfort others? 

Nevertheless, after he had mastered all of Muzan's abilities, there was something that he had to do first, and that was to gain the DNA of powerful demons, the rest of the members of the protagonist's group, and also to help Nezuko to return as a human. 

Fortunately, all of that could be achieved at the same time, especially when he had found a trace of powerful demons in Tokyo, to be exact, in Asakusa. 

Isao almost forgot about the existence of those, especially when his memory of "Kimetsu no Yaiba" was quite fuzzy as it had been so long since he watched the story, but then, with the ability he gained from Muzan's DNA, he could recall those memories as "biokinesis" ability could also help him to control his brain, helping to remember all the memories he had lost. 

If there was someone who could help him to transform Nezuko back into a human, then it could only be that demon. 

Still, when he left, Kie, who had just returned to Yokohama, was surrounded by Kanae, Hinatsuru, Makio, and Suma. 

Watching how rosy and smooth Kie's skin was, the four of them knew that something had happened between Kie and Isao, and at the same time, they also knew what kind of preference Isao had. 

Naturally, if Isao knew what they were talking about, he would shake his head, thinking that a good person had always received an injustice and been bullied by others. Yet, as he had a vast and kind heart, he decided to forgive them, especially when they were pregnant, but when they had given birth, then well... they had to prepare themselves. 

Still, as expected of Tokyo, as a city with the largest population in the whole world, it was so populated, and there were so many people that you wouldn't believe it. 

Then, with such a number of people, how could he find his target? 

If it was before, Isao might have trouble. Even if he could control and create many animals with part of his body to search for his target or use his sense of smell, it would take so long to find his target among tens of millions of people in this country.

However, as he had gotten Tanjiro's DNA, his luck worked incredibly, and when he walked randomly into Asakusa, he happened to meet a petite, beautiful, mature woman. Among all the people present, her beauty was extraordinary and impossible to ignore.

At the same time, by her side, there was also a young man who was looking at everyone with a hostile expression, especially those who were looking at the woman. 

Naturally, his appearance also attracted everyone, especially his strong body and handsome appearance. Whenever he walked, he was the center of everything, and his existence eclipsed everyone. 

The mature woman and the young man also noticed Isao, and somehow, they felt a sense of forbidding, which caused them to disappear directly from the crowd. 

"Oh?" 

Isao was surprised and realized the ability of the young man. Previously, he saw the young man take out a paper-like item and then press it on his forehead. The woman also did the same, and when all of that happened, the two disappeared, but even if they couldn't be seen, he could smell their scents and hear their noises. 

Hearing how heavy their breathing was, he could tell that they were so nervous and frightened, but then they appeared to be calm after they ran away. He might not have been able to see them with normal eyes, but as he had the DNA of a mosquito, he could see them through his infrared vision, watching their body heat and the carbon dioxide they exhaled. 

Yet, he had to say, watching how they felt relieved, knowing that they had escaped from him, but the truth, they didn't at all, was kind of fun. 

Nevertheless, no matter how they ran, it was impossible for them to run away from him, especially when he had registered their scent.

After waiting for a while, Isao decided to make a move. 

As for the two who ran away, they felt relief when they arrived at their house. Similar to how they disappeared, the young man also used a paper-like item to hide the presence of their house, and it was impossible to find them. 

"W-What is that, Tamayo-sama?" 

While he didn't realize it, the young man's voice was trembling. 

"It.. should be a Demon Slayer." The mature woman also felt her legs were weak when she was gazed at by Isao's eyes. 

"Demon Slayer? Impossible! He is so strong! And his presence..." It wasn't his first time seeing a Demon Slayer, and he thought it was impossible for a human to have such an overwhelming presence. It was as if his presence was simply lower than him, and he was of the lower caste, and his body urged him to lower his head toward Isao!

While he hated this feeling, he couldn't stop it! 

As his body was trembling and rejected the idea of thinking Isao was a human, the mature woman was silent, but she wasn't wrong. Instead, Isao reminded her of someone from a few hundred years ago. 

However, if that person's existence was a warm sun that gave everyone hope, then Isao was a bottomless abyss that swallowed everything. 

Fortunately, the two could escape, so there was nothing they should be worried about, right? 

However—

Knock! Knock! Knock!

The sound of knocking on the door resounded, and they felt their hearts stop for a while. What should they do? Their thoughts froze due to fear, and they were unable to form a proper judgment. Then, a voice was heard from behind them, and his hands touched their necks softly. 

"Do you want me to kill you two or let me enter your place peacefully?" 

His voice wasn't loud, yet they could feel the wrong choice of words would lead the two to death. 

Only in their minds, 'Aren't you already entering the house?' 

[You have acquired the Yushiro's DNA.]

[Do you want to absorb it?]

[You have acquired the Tamayo's DNA.]

[Do you want to absorb it?]

Isao thought that his luck was as great as ever~! 

---

Happy 100 chapters~!