If a person just walked up in front of the class, and this person adorned the standard uniform of the Academia, and then suddenly introduced himself as the homeroom teacher of the said class, there was no way anyone would outright believe him, especially when his appearance resembled that of a young man.
"There goes the joker of this class!"
"Is he crazy? Haha!"
"Oi, nice try! You easily made my day with your pretense! I'll give you ten points for acting, out of one hundred, of course!"
"Hahaha~!"
Standing still, Zero remained in silence for some time before taking his seat on the sole intricate wooden chair of the platform. He then neglected the cacophony of noises that resumed, mostly the maddening laughter because of what he just did.
However, after around ten to fifteen minutes had passed, no other professor arrived. Then, another fifteen minutes were wasted, and no other professor arrived. Some of the noises even already died down.