Nobita（大雄） is a little Japanese schoolboy. He doesn’t study well. His classmates Gian and Suneo often bully（欺負(fù)） him. His robot cat always helps him out. The robot cat is Doraemon（哆啦A夢(mèng)）. Where is Doraemon from？ Why does he help Nobita？ Doraemon comes from the year 2136. A boy named Sewashi sends（送） him to Nobita.

Sewashi is Nobita’s great-great-grandson（玄孫）. He lives in the year 2136，too. He knows that Nobita will have a bad life in the future（將來(lái)）. So he thinks Nobita should try to change（改變） it.

Now it’s time for Doraemon to go to the future. He will say goodbye to Nobita. The story of them is coming to the end. Is it a happy ending？ You can find out the answer in the cartoon movie Stand by me Doraemon（《哆啦A夢(mèng)，伴我同行》）.