Xiaoxin is 5 years old this year, don't think he's the kind of ignorant child, he is actually a big ghost, likes a beautiful sister, adopted a stray dog like a marshmallow - Xiaobai, and often tells some nonsensical yellow jokes. Xiaoxin's mother Meiya is a full-time housewife, careless and a little neurotic, she is often tricked by Xiaoxin to smoke, and her father Nohara is often confused by these two mothers and sons. The author of "Crayon Xiaoxin" observed the world with the eyes of a 5-year-old child and the mentality of a 40-year-old adult, and saw many bizarre scenes, and the humorous story of Xiaoxin's family was born.