I doubt he stole it. It might have just been he got his work put in a museum because the teacher helped him out. Don't assume the worst just yet! ScarletteLivesForKazuichi'sAss
I saw the raws as well and the teacher has a really evil looking smirk + I translated one of the comments and it definitely seems that the teacher in fact did steal his work
Σ(っ°Д °;)っOmg that art teach defo stole his work
Chiara pls expose that lying, other people work usurping dirty conman