Fantasy Assassin in a modern world

Yui Minato the current head of the Yui Clan was reading reports on his desk with a frown on his face. Ever since his father died it has been one thing after another. Without a Grand Master martial artist in the Clan, the Yui Clan was doomed to become a lower-tier Clan. Right now the Clan was being bombarded by its former enemies wanting to eat it up. 

There were also many Clan members that left after his father died. Just remembering what the elder of the clan said to him as he left the Clan made Minato feel anger in his very bones. 

"Hmph, it would've been better if Sakura was still alive, at least with her strength the Clan wouldn't be as affected by the Patriarch's death as it is now. Unfortunately, you and your other siblings don't have the talent." 

When Minato heard the elder say those words in such a condescending way he wanted to attack but could do nothing since that elder was a rank nine martial artist while he was just at the seventh rank. The difference of two ranks was large and the elder could easily crush him. 

That elder was a loyal follower of his father, and now he alongside his group has separated from the Clan. The current Yui Clan was now just a shadow of its former self. 

Not only was the Clan declining at a very fast pace, but Minato's siblings also haven't done a single thing to help. Most of them continue to do whatever they wanted. Even though he wanted to scold his siblings he knew that this was what he promised them if they followed his plans and allowed him to become the Head of the Clan. 

'Damn it, is this really all I can do?... I guess my only hope to get the strength of the Clan back is if we get a Grand Master martial artist. Who knew even after death you would piss me off like this, Sakura... Well, I guess it's alright since she did give me her daughter as a gift. Unlike her mother, I can control this little one. I just need to wait for her to mature a bit more, and she might turn out to be the youngest Grand Master in history. Once she gains that honor the Yui Clan's prestige will shoot upward.'

When Minato remembered that talented niece of his and the future influence he could obtain using her, he couldn't help but smile. Still, that was a rather distant future, as right now he needed to somehow stabilize the situation within the Clan. 

Yet the most troubling matter for him was the attitude of that person. The moment his sister died that person's attitude to the Yui Clan drastically changed. 

'Was he perhaps in love with my sister?... No, if that was true then he would've reacted more violently...' 

While Minato was thinking about how to have a better relationship with that person, someone entered his study. Seeing the person suddenly enter without knocking made Minato frown. Seeing Minato's reaction the person who came in immediately understood what he did wrong and bowed his head. 

"I apologize Clan head for bursting in without warning. I have urgent news to tell you." 

Minato looked at the frightened clan member and sighed. 

"Speak." 

"Members of the Elite Dragon Brigade are coming here to do an inspection." 

When Minato heard what was said he stood up from his chair with a shocked expression on his face. He didn't respond to the person bowing before him and quickly left the room. The Clan member followed behind Minato. 

'Damn it, it's just one thing after another. Why are those people from the Brigade coming now?' Minato then looked at the Clan member who was following behind him.

"Take our best men and bring Willa to the outer base." 

Willa was the daughter of John and Sakura that was taken. When the Clan member heard Minato's order he gave a bow and left. Afterward, Minato tried to contact his siblings but none of them picked up their phones. Minato was infuriated but could not do anything about the situation. He clicked his tongue and gritted his teeth.

...

Matsuri and John alongside the two soldiers of the Elite Dragon Brigade were near the Yui Clan's estate. Before they entered both Matsuri and John wore a cloak and a mask. Once they had reached the main house of the Yui Clan, they were greeted by the smiling Minato. 

"My dear friends of the Elite Dragon Brigade, how can I help you today?" 

The moment John saw the smiling Minato he felt something within him wanting to burst out. Even though he once said that he had forgiven the siblings of his wife and that he didn't want revenge, he was still human in the end. While John was trying to calm himself, Minato finally noticed the two who were wearing a mask and a cloak. As he was about to ask about them, the two soldiers spoke before he could say anything. 

"Yui Minato, the Elite Dragon Brigade has received numerous evidence of your Clan dealing with contraband items. Here is a search warrant issued by the supreme commander of the Elite Dragon Brigade." 

Minato was shocked by what was said but he still showed a smile on his face. He then nodded his head as he responded. 

"I see... It would seem that some of my clansmen have gone astray due to the death of my father. Very well, please help me cleanse my clan of these filths. So the four-" It was at that moment Minato noticed that the two wearing masks were no longer in sight.

"What happened to your two companions?" 

"They have a different mission." 

"Oh, alright then... Please search all you want, I will help with this investigation however I can." The way Minato spoke was truly convincing.. Even the two soldiers who were already aware of the truth were in awe of Minato's acting skills.