The Earnest Gum

Doraemon got a call telling that Nobita haven't arrived yet. So he checked and found Nobita was playing volleyball. Knowing his promise with Shizuka, he think that he's a forgetful person. He wants a gadget that makes him discipline. Then, Doraemon pulled out the earnest gum and explained it. Nobita ate it and set his schedule.

On the way, Suneo invited Nobita to read his comic book, but Nobita refused and ran away. Midway, he met Gian that want to sing a new song, Nobita ran away again. Finally, he arrived and make the homework together. It's complete, Shizuka invited him to play a new game, but Nobita refused and went home.

All of sudden, a kid told him that Gian wants to beat him up, but he keep following his gut. As he met Gian, he ran away as fast as possible. Fortunately, Nobita went home on time. Then, Doraemon tells the truth about the gadget. Knowing he could do anything without any gadget help, he misunderstood and fell asleep. Seeing that, Doraemon beat him up.