Fantasy Assassin in a modern world

Shin had finally defeated Hayate after a rather grueling battle. The last spurt of strength Hayate showed at the end was quite something. Yet even after such a battle that filled his very soul with a thrill like no other, Shin felt like he needed more as his blood was boiling with utter excitement. 

Shin's blood was pumping and even though he was rather tired he still wanted to have another fight. As he was trying to calm himself down, Shin who was used to battle had a sort of sixth sense to spot enemies. At this very moment, he suddenly felt the presence of numerous men but he could not hear their footsteps.

While he was trying to sense were the group was, in the next second Shin was surrounded by men wearing red uniforms. These men carried one sword at the waist, a knife hidden in their boots, a pistol at their side, and they were holding rifles that were aimed at him. 

Obviously, Shin knew who these people were. A special battalion that was created to deal with any martial artist that causes trouble within the country. The members of this elite brigade were at least rank five martial artists and above. There were also some non martial artists within the group, for as long as they have the skill to keep up then they were eligible to join.

Those non martial artists were mostly enhanced humans that had various mechanical upgrades done to them. Though they looked the same as any other human, most of their body parts have been replaced to enhance their strength, so that they would be able to keep up with martial artists. 

Each city has a designated squadron from the Elite Dragon Brigade that protected them. They are also tasked to help the police force whenever necessary. 

It was obvious to Shin that he was no match for this group, but even so, he wanted to fight. Now that he had proper opponents to face, he wanted to continue and see the limits of what he could do. So without hesitation, Shin charged at the group. 

One of them presumably the leader of the group signaled one of his men to step forward. One of the uniformed men nodded his head and stood up intercepting Shin. Seeing the soldier confronting him, Shin could not help it as his smile grew even wider. 

Shin used a palm strike to attack, the soldier evaded by shifting his body to the side. Shin was going to follow up his attack but then he suddenly fell over. He could not understand what happened nor how it happened but now he was laying on the ground. The soldier then grabbed hold of Shin's right hand and twisted it, he then proceeded to place his knee on Shin's back pushing him down. 

Shin tried to move but no matter how much he struggled he could not even move an inch. Shin was then handcuffed using energy blocker handcuffs. These things disrupt the flow of inner energy, making anyone who uses inner energy unable to use it and feel incredibly lethargic. 

"Target is secured." The soldier reported. The leader of the group responded by nodding his head, he then started looking around and gave an order to his subordinates. 

"Take pictures of the crime scene, and once that's done check the status of these children. Administer first aid and If they're alive bring them to the back of the truck. As for those gravely wounded inject them with the serum." 

Hearing the command of their Captain the soldiers went to work. The Captain looked around and noticed an abundance of thread laid on the ground. He then looked at the children that had fainted, most of them seem to have been hurt by being punched or kicked at, but some of them had been injured by a sharp weapon. They had multiple wounds but most were only flesh wounds. 

The Captain would have thought that Shin did all of these, but based on Shin's own injuries which were similar to the others making him looked less suspicious. It was possible that he was cut by someone else maybe a third party. The Captain then knelt on the ground and picked up the thread that was on the floor. 

'This is just a simple thread made of cotton. The injuries these kids received shouldn't be from something like this. Even if a master of inner energy release were to infuse their inner energy into this thread it would be unable to hold and immediately break.'

After looking at the scene a few more times, the Captain was sure that there was supposed to be one more kid but he wasn't here. 

'Was it the missing kid that injured the heir of the Mugami Clan and the other children?...'

The Captain couldn't see a clear picture of what had transpired here, he was missing too many pieces. He then looked at the only kid that was still conscious, the heir of the Mugami Clan, Shin. 

"Hey, so why don't you tell me what happened here?" 

"Sure, but only if you promise me one thing." 

When one of the soldiers heard the way Shin spoke to his Captain he immediately got angry and clenched Shin's neck lifting him up. 

"You f*cking brat! Who the hell do you think you're talking to?! Even your elders in the Mugami Clan would never have spoken like that to the captain!" 

The soldier then started to squeeze Shin's neck. Even though he was in a dire situation Shin was still smiling as his eyes continued to look at the Captain without even blinking as if he were waiting for his answer. 

"That's enough Sergeant, let him go." 

"But Sir-" 

"That's an order!" 

The sergeant finally released Shin who started coughing a bit, before standing up. The Captain waited for Shin to regain his balance before he spoke. 

"So what is it you want." 

"It's nothing much, I just want to gain the right to have a fair duel with you, one of the Captains of the most notorious Elite Dragon Brigade." 

Hearing the request the Sergeant wanted to once again choke Shin, but his Captain signaled him to stop. 

"Very well, once you have recovered you can come to our base anytime and I will have that duel with you. So how about telling me what happened here."