Life comparing story between Anna and Carol. Both of them are best friend and both work as factory girls but in different factories. Anna’s factory uses a metal roof and Carol’s uses Ha Huang Corroshield Roof. In order to see the difference, their heads are changed into corn seeds. Surprisingly, we see that Anna’s head has popped into popcorn, because using a metal roof can make the roof hotter. She only hopes that her factory will change to Corroshield roof.