Fantasy Assassin in a modern world

"Sorry I decline, if that's all then goodbye." 

Loki did not bother to wait for Shin's reply as he entered the library. Shin was stunned into silence as this was the very first time someone with the status of a teacher didn't accept his challenge for a spar. Usually, the teachers in the martial course of this school would accept any request for a spar from the students. 

Of course not only do the teachers do this to help the students improve, but they also do this because of their pride as martial artists. Unfortunately for Shin, Loki doesn't care for either of those. Shin snaps out of his stunned state quickly burst into the library with a bang. 

"Shh, quiet down you do know this is a library." 

"Sir Loki, why won't you accept my challenge?"

"Why should I accept it?" 

"Aren't you afraid that this might make you look like you're afraid of a student? This might lower your reputation." 

"Huh, why should I care what others think of me?" 

"Then as a martial artist don't you want to test out your strength?" 

"No, not really. So anyway, I need to get started with my work, and the bell is about to ring so you better go." After Loki spoke the school bell truly rang. Distracted for that single moment when Shin's attention returned to Loki that latter was no longer there. 

Shin looked around and could not find a single trace of Loki it was as if he had vanished into thin air. Seeing this Shin could not help but smile. 

'This guy is better than I thought. Now I really want to fight him.' 

...

When Loki saw Shin leave the library he sighed. He already knew that doing something like that would most probably excite a battle-hungry person like Shin, but waiting for him to leave would be more troublesome. Also, now that Shin has the impression that he was faking weakness, it didn't matter what he did. 

'This is going to be really irritating. If only I had enough mana to use a mind wipe spell... No, that won't work either. Even if I do wipe away his memories of me being a decent martial artist, based on his personality once he relearns about me he would try to pester me again.' 

Loki sighed as he could not think of a good solution on how to avoid Shin. 

...

When Lunch break came Michael came as per usual but this time he brought someone unexpected with him he brought Shin with him. 

"So Sir Loki have you thought about my earlier request?" 

"That's still a no." Loki firmly rejected Shin's request for a spar. There was no advantage to be gained if he fought Shin. In fact, no matter if he won or lost nothing good will happen to him. 

"What can I do to change your mind." 

"You better look for someone else to challenge, since no matter what you do I won't change my mind. Why do you want to spar with me anyway? I'm just a librarian who luckily awakened my inner energy. I'm different from you who has been training your entire life. Fighting me won't be beneficial for either of us." 

"Well, that's what you think. To me the mere fact that we fought is beneficial." 

"I see, I understand." 

"Then-" 

"But I still refuse."

Loki turned around and went back to work. Since Shin was here Michael couldn't ask Loki for help and could only find a corner were he could meditate. On the other hand, Shin was momentarily stunned but quickly recovered. He was not going to give up just because of some setbacks. As he was about to continue pestering Loki he found that he was no longer there. 

'Even now I cannot detect the moment he leaves. Still, I'm sure he's in the library since there are students here and he needs to attend to them.' 

It was as Shin said, Loki still needed to do his job and he found him helping students find the books they were looking for. This time Shin did not allow Loki to leave his sight as he continued to bother him all throughout lunch. He even wanted to stay in the library after the lunch break was over. When Loki heard that he alongside Shin went to the principal's office. 

...

"So student Mugami wants to stay in the library." 

"Yes sir, I believe that I can improve my mental state if I stay in the library." 

The Principal was surprised by what Shin had to say. Ever since this genius of the Mugami clan entered the school all he did was fight. The first thing he did was to challenge all the teachers in the martial arts course. 

Shin had actually defeated two rank four martial artists despite being a rank three. The teachers whose prides were broken by Shin had resigned. Even though the remaining teachers had won against Shin, they felt a lot of pressure.   

After he was done fighting all the teachers in school, Shin had reportedly challenged the students of other schools, to unofficial duels. As the Principal of the school, he had received numerous complaints. Normally if another student did this he would either be suspended or expelled, but he could not do that with Shin. All the Principal could do was give a verbal warning. This was because Shin was the heir of the Mugami Clan a top clan. He could not afford to offend such a student. 

The Principal had no idea how to stop Shin's rampage. In fact, he was already at wit's end when he heard that Shin had a challenge a Caption of the Elite Dragon Brigade. So now that Shin said that he wanted to improve his mental state the Principal was so happy he almost jumped in joy. 

"Oh, that sounds wonderful! Of course, you can stay in the library. In fact, you don't need to attend your classes. If you want you can stay in the library for as long as you want." 

When Loki heard what the Principal said his face contorted.. Seeing this Shin couldn't help but smile at Loki.