If you get bigger, you have to report the class rules to the teacherOokiku Shichattara Sensei ni Houkoku Shinakya Ikenai to Iu Gakkyuu Rule; 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; 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