Set The Room Guard

Nobita returns home to find his mother angrily waiting at the door. He uses his "Take-copter" to enter the room through the window and learns that his mother found his zero-mark test paper while rummaging through the drawers. To prevent his mother from entering his room, Nobita uses Doraemon's "Room Guard Set" to guard it. Because he fails to give the correct password within a minute, his mother is electrocuted, much to Nobita's delight. When Suneo and Gian come to play baseball with Nobita, they are also electrocuted. Doraemon is angry at Nobita for misusing the gadget, but Nobita changes the password while he's giving Gian and Suneo their bats, preventing Doraemon from entering the room. Nobita is too scared to go downstairs, so he goes to the park to use the restroom. However, he runs into Gian and Suneo at the restroom door and has to go to Shizuka's house to use the restroom. When he comes back, he can't enter the room through the window. Because he can't say the correct code "raw wheat, raw rice, raw eggs" within one minute, Nobita also gets an electric shock. Instead, he scolds Doraemon for misusing the gadget, which causes Doraemon to get an electric shock again.