Swapping Moms / Nobita Disappeared?

At the beginning of the story, Nobita is suddenly scolded by his mother for "no reason" and is kicked out. Later, Suneo and Shizuka also encounter the same situation. They happen to complain to each other and feel that their mother is the most vicious. When Doraemon goes to the clearing, he uses "Family Box" to swap mothers: Shizuka's mother becomes Nobita's mother, Suneo's mother becomes Shizuka's mother, and Nobita's mother becomes Suneo's mother. Gian’s mother chases and beats Gian. After the exchange, all three mothers feel that they have scolded them too harshly and apologize or express kindness to them. Nobita also helps his mother with housework because Shizuka's room is filled with dolls. Unexpectedly, she knocks over a bucket and gets wet. Shizuka's mother hurriedly helps Nobita changes her clothes, but finds that they are all girls' clothes. Nobita and Doraemon leave quickly before the situation is noticed. The three of them get together again and tell each other about each other's situations. Everyone feels that mothers are human beings and sometimes get angry because of misunderstandings, so they decide to replace their mothers. But in the end, Nobita's underwear is left at Shizuka's house, and Shizuka's mother sends it back, which makes Nobita feel ashamed.