Xiaoxin is a little boy who is only 5 years old and attending kindergarten.He is precocious at heart and likes to admire and chat up beautiful women.Initially, Xiaoxin, his father Guangzhi and his mother Meiyi formed a three-person family.Later, the stray dog Xiaobai was added, and his life was often trivial but full of warmth and touching.As the story unfolds, a new member, sister Nohara Himawari, is added.