Xiao Xin is a 5-year-old boy who is attending kindergarten. He is precocious and likes to appreciate and chat up beautiful women. At first, Xiao Xin, his father Guang Zhi and his mother Meiya formed a family of three. Later, another stray dog, Xiaobai, was added. Life is frequent and trivial, but there is no lack of warmth. As the story unfolds, a new member sister, Nohara Kwai, is added.
Xiao Xin's house was burnt down. In the 370th sentence of the cartoon "Crayon Xiao Xin", something suddenly happened to Xiao Xin's home. Xiao Xin's house was blown to the ground, and Guang Zhi began to look around for a new place to live. Although the insurance company will pay for the repair of the house, it still needs to save money before the completion. Guang Zhi entered the first real estate company, but after the chaos between Maggie and Jilin, he was kicked out of the house, and so was the second one.