The So-Called Class Rule Where You Must Tell the Teacher Whenever Your Thing Gets Bigger

大きくしちゃったら先生に報告しなきゃいけないという学級ルール / Ookiku Shichattara Sensei ni Houkoku Shinakya Ikenai to Iu Gakkyuu Rule / The So-Called Class Rule Where You Must Tell the Teacher Whenever Your Thing Gets Bigger / The class rule where if you get bigger, you have to report it to the teacher