Fantasy Assassin in a modern world

The day after Milly was rescued from the Yui Clan, the clan was struck with different attacks from numerous places. The Elite Dragon Brigade learned that the sect they were after had stopped assisting the Yui Clan. Upon learning of this several high-ranking officers of the Brigade were enraged. The bait they had set and waited for months now was unable to entice the prey, in fact, the prey did not even like the taste of the bait and quickly let it go. Now that elusive hidden sect was once again far from their grasp, they were furious.

...

The Elite Dragon Brigade was one of the strongest forces within Zothril, and even they could not catch a glimpse of this sect. The goals of the sect, its members, and everything about it were shrouded in mystery. 

The government of Zothril has zero-tolerance for any sect or clan that does not submit to their laws. Unfortunately, there were some sects and clans that could not let go of their glorious past as rulers, so the government had to deal with them. 

Some of the sects and clans that had rebelled against Zothril were now working for the government as soldiers with tight leashes, and those were the lucky ones. The unlucky ones, those who did not want to follow the law of Zothril were annihilated, not a single sect or clan member would survive, they would not even spare the children. The public doesn't know about this mass execution and were blissfully unaware of the sacrifices, the hardships, and horrors the government had done for them to enjoy what they currently have. 

From the start until the present the only thing that the Zothril government could not control was this secret sect, that seemed to have existed since the beginning. There were many theories as to what this sect was. There was even an entire special department created just for the sake of learning more about this mysterious sect.

The more they learned about the mysterious sect the more confused they became. It would seem that this sect was part of the initial allied sects and kingdoms that resisted the Empire in the early days. Yet all the documents regarding that era didn't have any sect that match the description of the mysterious sect. 

It didn't just end there, it seems this secret sect had a hand in every major event within Zothril since its infancy. There was also a theory that all of the government's actions to catch this sect was an act and they didn't really want to capture them. There were also some who theorized that the true ruler of Zothril was this sect. Others think that this sect was the necessary evil that the government allowed to control the underworld. 

Yet no matter the theory, the stance of the current leader of the Elite Dragon Brigade, the genius who is said to be the strongest Grandmaster rank martial artist in Zothril was that this sect was not welcome in Zothril. So ever since the current leader assumed the role of General of the Elite Dragon Brigade his main mission was to annihilate this mysterious sect. 

So he was the most enraged when he learned that the bait they patiently watched didn't attract the prey they wanted to capture.

Now that the Yui Clan was useless to Elite Dragon Brigade and they had lost the protection of the mysterious sect they were like little rabbits that had come out of the hole and were greeted by the hungry wolves.

With the many crimes, the Yui Clan had committed over the few months Minato became the head they had gained a lot of enemies. They were fine at first since the mysterious sect protected them, but now that everyone knew that they were not protected all the hungry wolves circling them were going to strike. 

The first ones to strike were the enemies of the Yui Clan that had waited for this exact moment to happen. These clans and sects were low-tier ones and had been bullied by the Yui Clan for a long time, even before the time Minato started his reign. So now that they had the chance they started targeting the lands and businesses the Yui Clan own. 

The next to strike were the former allies of the Yui Clan the allies they had since the older generations. These clans and sects took the stronger people of the Yui Clan as servants or concubines. They were not too bad as they had offered many benefits for defecting to their side. 

The final one to strike was the Elite Dragon Brigade, they had captured the remaining members of the Yui Clan who were mostly from the main family. Those that resisted were killed on the spot. Minato's siblings tried their best to escape and survive, they tried hiding by finding their so called friends. Unfortunately for them, those friends of theirs weren't true friends, and the moment they contacted them they were ratted out. 

The siblings who knew the taste of power didn't want to be captured nor did they want to become servants of another sect or clan. Many of their siblings had fought against the Elite Dragon Brigade to escape, unfortunately, they weren't strong enough to resist and were killed. The entire country was now treating them as extremely dangerous terrorists. 

The remaining siblings were now gathered in their final secret base. There were only three siblings left including Minato. 

"This is all your fault Minato! I didn't really want to kill big sis Sakura, but you blinded me with treasures, and poisoned my mind with your words! If big sis Sakura was still alive none of these things would've happened. Now the Yui Clan is only us, and there's nothing left!" 

"Hiroto is right, you promised us you could deal with this and that we don't have to worry. You said helping that sect would bring us endless benefits but instead they condemned us to this state." 

"Shut up, you f*cking brats! Don't act all innocent, you two decided to join me under your own volition. It was not only my hands that took Sakura's life the two of you were there as well!... Fine, if you guys think I've done so many wrongs you two come up with a plan to solve this problem! I'm leaving, and from here on out we are no longer siblings." 

Minato turned his back and was about to leave, but then he sensed something was wrong. He was going to dodge but he was too late as two swords had impaled him. He looked at his two brothers with a shocked expression on his face. 

"... You... Two..." 

"You're right, big brother, we will solve this problem ourselves, but first we need to eliminate the main cause of the problem." 

"Hmph, it should've been you we've killed in the first place, instead of big sis Sakura." 

As he was dying Minato was filled with resentment, unwillingness, and deep hatred. Even as he was dying the last thing he was hearing was how much better his little sister of his was than him. 

'Even in the end, you haunt me..' Those were Minato's last thoughts as death took him.