Bothering

"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."