Various Shellfish Set

After school, sensei gave his students a lot of homework today. Nobita asked Shizuka to do homework together in his house, but Gian and Suneo mock him, saying, "Nobita can't do anything right " This makes Nobita lose all his motivation.

At home, Doraemon opens the window. A cold breeze blows in, but for some reason it's warm near Doraemon. It turns out that Doraemon has been wearing the "Warm shell" or アタタ貝/Atata-kai" from the "Various Shellfish Set" on his back

Doraemon suggest Nobita to use Do it! Shell "ヤリ貝/Yari-kai" so that he has high motivation to do all the difficult homework today. After finishing doing homework, Tamako asked Nobita to pulling out grass in the yard, but Doraemon receive his reward because he uses a pocket money shell "オコヅ貝/Okodzu-kai" in his back. Then Nobita call Shizuka to tell her a little secret to doing homework easily and he went to Shizuka's house to give hilem the Do it! shell.

On the way to Shizuka's house, Nobita meet with Gian who want to do homework together in Suneo's house. However, Gian take the Do it shells when Nobita show that stuff to him. Doraemon and Nobita go to Suneo's house to get the shell back from Gian. They both used Invisibility Lacquer so they can sneak into the house without being noticed. Then Doraemon throw Failure shells マチ貝/Machigai to Gian. As result, Gian filled in all the answers incorrectly.

Gian decided to invite Suneo to play ball at Open lot. Doraemon throw a troublesome shells makes Gian to breaks the Kaminari's glass. Then her used a introduction Shells make Gian to introduce himself to Kaminari. As result he get punised by Kaminari.

Eventualy, Nobita can go to Shizuka's house to give her a Shells. But before that, Doraemon give a pair of shells if Gian and Suneo come back again to chase him. At Shizuka's house, Nobita give him a wrong one. So Shizuka-chan always making mistake when she using a failure shells. Then Doraemon come back to Shizuka's house to give her a right one. After that, Shizuka has the motivation to do her homework.

When Nobita want to go home, angry Gian and Suneo come to chase him. Nobita threw a pair of shells given by Doraemon before to them both. In the end of the episodes, they used sports shells ウンドウ貝/Undou kai. It makes Gian and Suneo compete with each other in running race.