The story is based on what happened to her at home and at school.
Nothing supernatural. Just her everyday mistake in life that seems so big at the time and so funny now when we looked at it. Like forgotten homework, and accidentally eaten the cake prepared for a home visit from her sister's teacher.
it is black and white manga, but is also made into anime.
From the left back row: Father, mother, grandmother, grandfather.
From the left front row: Older sister, Maruko Chan
It is funny because it is a common things kids do. Like wanting to buy a toy but didn't really want to play after they got it. Like wanted to save a piece of cake later but forgotten about it and it turned bad when found.
Fun read.