Plastic eraser

Last week's answer is ③. If you make a mistake , watch the last week's movie again!
Ｐｌｅａｓｅ watch both two movies !

First movie is the art of plastic eraser. This art is made for its artist's school work .When I watched this movie , I thought the plastic eraser is "cruel monster". Did you think same thing ?
Plastic eraser does not play a role witch erases word but play a role witch erases world .

Second movie is life of plastic eraser . In this movie , the plastic eraser "Keshigomuta" complains about the violent way that his owner did. Why does he have complaint ? For answering this question , we need to know "the life of plastic eraser". So , I introduce the life of plastic eraser !
Last week , I introduced process of productive of plastic eraser . So , this week , I introduce the life is after they are bought someone and are used .
①Exist of corner
When one buys new plastic eraser , he or she often thinks that he or she must not use plastic eraser's corner. Because plastic eraser is "no corner no life " thing . Bad when people want to erase small words in small space , they erase by corner . Once they use corner , then they become to be willing to use the corner , althouh they use it for erasing large words .
So , plastic eraser's corner is the sign that they are new and are cherished by their owner .

②Round eraser
After using corner , plastic eraser become to be round eraser . Round eraser is not adequate to erase small words , so the owner doesn't use it than before . And the smaller eraser , the less using .
So , people often loss round eraser before they use up it .

Do you understand life of plastic eraser ?
I wish you cherish and use up it !!!!!!!!!!

Today I want to introduce two unique plastic erasers .
①”Kadokeshi”

Plastic eraser has a problem that they loss corner . Bad "Kadokeshi" does not have this problem , "Kadokeshi" is composed of a lot of corner and it can erase words by its corner until all its body become to be sediment. So , When its all corners is wasted is the time its owner uses up them .

②”Kinnikumannkeshigum”
This may be most popular eraser . This eraser's model is "Kinnikuman"(Japanese popular animation) So, people who like "Kinnikumann" collect them and don't use them , but display them .
Today , plastic eraser plays role as "For appreciation thing" 

Question: In second movie , why is plastic eraser "Keshigomuta" angry ?
①　His owner used him in very heavy way and bought new one before using up him .
②　When his producers produced him , they make him smaller body than other eraser .
③　He can't marry other plastic eraser because he has no corner .