Impossible opponent

So weak, Isao thought. 

Isao thought that the demon would be powerful, but then again, it seemed that he had overestimated them. Moreover, the first one that he fought was the Upper-Rank Second, Doma, who was also the third strongest demon. 

While Daki wasn't the real Upper-Rank Sixth or the seventh strongest demon, Isao remembered that the protagonist fought this demon in all of his fights, and she could even toy with the protagonist and his group even if, in the end, she died.

However, when facing him, Daki died without being able to fight. 

Yet, wasn't this better? 

Anyway, the faster it died, the better it was. 

While Isao had to admit that Daki was beautiful and that he might even dream of sleeping with many unique fantasy creatures, he didn't intend to touch her, considering her job and all.

It wasn't because he thought this woman was sick since, as a demon, it made her body immune to all sickness and ailments, but how cruel and how many people she had killed definitely made him unable to accept her.

At the same time, having her killed was far more beneficial to the world than letting her alive. 

Yes, instead of his lower body, he prioritized everyone's safety! 

"Iinuma-sama!" 

Only suddenly, his thought was interrupted when Suma hugged him from behind, tightly clung to him with her hands on his neck and legs on his waist, pressing her ample breasts against his back so generously and burying her face against his neck. 

'Wow, his scent is so good~!' 

As expected, in this era, everyone's scent was rather unbearable, considering the lack of hygiene products, so Suma loved this scent much~! 

Isao wasn't surprised by her reaction since he knew well that his scent was good. He wasn't sure why, but his thoughts and his scent started to change after he came to this world. 

Was it due to the demon's DNA?

Or was it due to Flowering Breathing?

After all, every breathing style was unique, and each gave its users a unique trait, such as the shape of the Demon Slayer Marks that each of the users mastered. 

Soon, Suma was hugged, which stunned her, and her heart beat so fast. 

'Eh? Here? On the open space?!' 

While Suma didn't mind being pushed by Isao, she also felt that it was still too early, especially when she had just lost her husband, but she also didn't want to refuse him. 

However, she felt like she should show a slight resistance, or else she was afraid to be seen as a shameless woman or a slut, she thought. 

"The battle doesn't end. Don't lose your focus," Isao said helplessly. 

"Eh?"

Only then did Suma realize that a crimson blood color gleamed on top of them? 

Yet, this wasn't the end since many blade-like weapons with a crimson blood color were thrown in their direction. 

"Hug me tight." 

"Um!" 

While Suma was scared, Isao's calm attitude enabled her to endure everything. Still, when she saw how he was able to dodge all the dangerous attacks smoothly without even staining his handsome suit, she was so excited, feeling how powerful he was. 

If they had a child, she was sure that their child would be healthy and powerful, she thought! 

"UMEEEEEEEEE!" 

Suddenly, from Daki's dead body, an ugly figure emerged. 

This figure cried so loudly with a disheartened expression as he held Daki's body, which was about to disappear, crumbling as if being burnt into ash. 

Yet, even under such sadness, this figure kept realizing dangerous attacks one after another toward Isao. 

Isao was calm and understood that this guy was the main enemy and the one who killed Tengen Uzui. 

"This one! He is the one who killed Tengen-sama, Iinuma-sama!" Suma quickly said as if a student had reported the naughty student to her teacher. 

While Isao was speechless, he didn't say anything and just nimbly dodged this demon's attacks. The attacks of the demon were dangerous as they were sharp and poisonous, but they couldn't touch him, so they were as good as meaningless. 

His sights were as good as the combination of owl, eagle, and butterfly. 

His sense of scent was as good as a dog's. 

His sense of hearing was as good as a bat. 

His sense of taste was as good as a catfish. 

His sense of touch was as good as a mole. 

He also had the sense of airflow from the cockroach and the reflex of a fly. Moreover, his speed and agility were as good as a rabbit. 

All of that was enhanced with the breathing style, the demon slayer mark, and the demon's body. 

With all of that, if this ugly demon's attacks could hit him, then the protagonist would die directly in the original story. 

"HOW DARE YOU?! HOW DARE YOU!? HOW DARE YOU?!" 

The ugly male demon glared at Isao with hatred and killing intent. His little sister, whom he loved dearly, was killed just like that; how could he not feel hatred toward Isao?!

Even worse, Isao was so handsome, dressed so handsomely, appeared so rich, had three beautiful widows by his side, and was also so strong! 

If an average harem protagonist could create hatred just because he was close to the heroines, then Isao's existence brought a vengeance of death to those sad boys! 

Yet, those hatreds were pale compared to the hatred of Gyutaro after he saw his little sister die, just like being killed by Isao mercilessly! 

Gyutaro was ugly, dirty, thin to the bone, and even poor. 

Yet, even with all of that, he had something to be proud of, and that was his little sister. 

Unlike him, his little sister was beautiful and one that he could be proud of. 

As long as his little sister was there, Gyutaro could do anything. Even when he became a demon, he could be with his little sister again. 

Yet, even if Gyutaro had such a cruel childhood, did he forget about how many people he and his little sister had hurt? 

Including how the two had killed Tengen cruelly before! 

Hinatsuru, Makio, and Suma had lost their husbands due to this demon, and with Isao, they were going to avenge their dead husbands! 

Still, the feeling of hatred and wrath had fueled Gyutaro's power even further. Moreover, as he had eaten the flesh of Hashira, Tengen Uzui, he had become even stronger, yet... yet... all of that wasn't enough to end Isao. 

Isao effortlessly dodged all of Gyutaro's attacks, even with Suma, who clung to his back like a koala before appearing in front of Gyutaro like a centipede that speedily scuttled away between cracks in rocks, litter, and logs before it captured, bit, and injected its prey with paralyzing venom. 

When Gyutaro realized everything, his neck was stabbed by the rapier-like blade, and he was pinned to the ground. He had lost his ability to move, and he couldn't even talk due to the wisteria poison. Still, as the Upper-Rank Demon, his body was more durable than an ordinary demon, and this poison wasn't enough to kill him. 

However, Gyutaro knew that he wasn't this guy's opponent, especially when he saw Isao's cold, chilling eyes, which looked at him as if he were garbage. His entire body shivered, filled with intense fear, knowing that death was near. Moreover, this death was due to the overwhelming difference in power. 

On his body, his instinct kicked in, and he quickly realized what kind of opponent he had faced. 

'Ah, I see...' 

Gyutaro realized everything, and he knew that this person was the one who had slain Doma, the man who had turned him and his little sister into demons. Even though he didn't know who had killed Doma, he felt that this person should be the one. 

Yet, he had become more unwilling! 

'Oh, why?! Why is the world so unfair?!' 

How could someone get everything? Yet he had always been like this, lamenting his weakness and unable to do anything to change his fate.

However, this was karma. 

A karma for all the people that he had hurt. 

While Gyutaro wished to bring Isao to hell with him, he couldn't do anything, especially when he saw the light pink blade was about to send him to the afterlife. 

Yet, when he thought that his end was about to come—

BOOOOOOOOM!

An explosion happened, and everything on earth cracked.

Due to the impact, Gyutaro was flown away. His body was broken, but even so, it was much better than being swiftly cut by the cold blade of the Nichirin blade. 

"You okay, Gyutaro?" 

"Akaza-sama!" 

Gyutaro was in tears as the help was coming! 

---

His style will be a combination of Insect and Flower breathing. 

Also, once again, is "Kenichi: The Mightiest Disciple" still popular too?