The 4D Build-Extending Blocks

Doraemon and Nobita are playing mattres fight in Nobita's room, but they got scolded by his mother because that's very disturbing. They both still wanted to play that game. Doraemon got an idea, he take out a gadget from his pocket called "Fourth Dimensional Building Extension Blocks" to add more room in Nobita's house. After the blocks were installed they continued playing mattress fight happily.

Then Nobita want to invite Shizuka-chan come to his house, when Nobita looking out of the house, the floor of the house had not changed, which should have been three floors. This was happened because the effect of Fourth dimensional blocks.

At Shizuka's house there are road repairs that make loud noises. Nobita suggested go to his house, there was a quiet room so Shizuka-chan could study there. When Doraemon was about to leave the house, he told Nobita-kun for not mess around with his gadgets. Nobita ignore his warning and he start making business to turn his house into the apartment with using this blocks.

Nobita put up a poster in front of his house, it says, "the apartment is ready to rent!". Then Suneo appear and he want to rent the apartement for one year, so he can read comic book in peace. Shizuka-chan invites Nobita to drink tea in her room, she thanked Nobita for renting out a quiet room for studying. Suddenly, there was a disturbance near Nobita's house. The road workers come in front of Nobita's house and make loud noise. This make Suneo and Shizuka feeling uncomfortable with that sound, they asked Nobita to do something. This getting worse because Gian wants to rent a room too. To fix this problem, Nobita added several blocks to reduce outside noise. But Gian use the room for singing.

Doraemon surprised seen that poster. He rush to the top floor get back the blocks that been used by Nobita till he get tired. Meanwhile, Suneo and Shizuka-chan Very disturbed by Gian's voice. So Nobita add more blocks to reduce Gian voice.

Then a man want to rent a room, Tamako was surprised about this. She get angry to Nobita and rush to the top floor. Nobita looking outside from the window panicked because his mother would come here. He add some block again to prevent his mother come to the top floor This made Tamako exhausted from climbing the endless stairs.

Nobita enjoyed the view from the window. Suddenly he want to a toilet, Nobita quickly went down the endless stairs. On the way he met Doraemon and asked him to return the blocks. Nobita couldn't stand it anymore and was confused why he didn't reach the bottom floor. this was because Suneo was messing around with the blocks, which made Nobita unable go to toilet on time.