"Don't worry, I can understand your eagerness to begin. I am absolutely glad to see such enthusiasm. Anyway, practice will start tomorrow, after you have had a good night's sleep. In fact, if tomorrow you are still tired from your journey, then we can wait until the day after. There is no rush", Valerion said with a smile.

"Thank you so much, sir".

"Ah... yes, and -- no 'sir', please", Valerion said in a low voice, with a dismissive gesture of his hand.

"No 'sir'? Then, what should I call you? ...'Master'?".

"'Master'?!", Valerion repeated in a very amused tone; he then lost his composure into laughter again. He put both his hands on the armrests, and leaned forward. "So, you do think I am an evil professor!".

"No! -- no, I -- oh -- I apologize --". Adrien felt quite flustered, but still couldn't help but chuckle at the situation.

Valerion got the last of his laughter out of him, and then continued calmly, but still with a somewhat contorted smile to his expression: "You don't need to call me anything. There is no need for needless formality, really".