It is a work about the friendship between a teacher who claims to be 150 years old and his children.
This story, based on the author's experience as an elementary school teacher, was written because she felt saddened by the reality that is full of heartbreaking stories.
The author believes that children should grow up dreaming of joy and happiness, even if the reality surrounding them is filled with sadness.
The unwavering imagination of innocent children, the gentle emotion, and the lively illustrations that hide powerful humor throughout are enough to captivate children.