After hearing stories from his father about the past, Nobita begins wishing he could live in an older era without school or homework. Ignoring Doraemon’s warnings that life in the past was actually difficult, he travels back in time and ends up in a primitive countryside. A farming family lets him stay with them, but Nobita quickly realizes how harsh life is without modern comforts like television, manga, or proper food. As hunger and discomfort grow, he starts regretting his decision.