Secret Passage Ball Pen

Nobita and Doraemon watch a TV series about the Warring States period. Nobita sees the lord of the castle escape through a tunnel led by his retainers, and suggests to Doraemon that he build some escape tunnels so that he can escape from his mother, Gian and others. Doraemon takes out the"Secret Passage Ball Pen", but asks Nobita to "only use it in an emergency." However, Nobita almost immediately plays a prank after getting the pen: he deliberately says that he doesn't do his homework, causing his mother to scold him, then escapes to the toilet and draws circle behind the door to escape. He walks to the street to anger Gian, and then draws an escape hatch in the entrance of a house, next to a garbage station, and in an empty lot. Doraemon plays dominoes, and fails to stop Nobita. Mom goes to Nobita's room to find Doraemon, and Doraemon reports Nobita's evil deeds to her mother. The two wait in the room for Nobita to come home. At this time, Nobita no longer uses the ball pen to play pranks, but goes to Shizuka's house. After that, the three holes that Nobita draws on the street all have accidents or are attacked: Gian complains to Suneo that Nobita is elusive. Suneo quickly sees through Nobita's trick and points to the circle next to the garbage station to wake GIan up. In revenge, the two throw the garbage next to them into the hole. Nobita helps the lost children. All people and debris are thrown into Nobita's room. Mom and Doraemon are furious when they see this, and go out to catch Nobita before he even walks into the house. Nobita is unaware of the disaster he has caused and is very panicked.