Yotsuba&! is centered on Yotsuba Koiwai, a five-year-old adopted girl who is energetic, cheerful, curious, odd, and quirky,so odd and quirky that even her own father calls her strange. She is also initially ignorant about many things a child her age would be expected to know, among them doorbells, escalators, air conditioners, and even playground swings.The series See More▼ has no continuing plot, the focus of the stories is Yotsuba's daily voyage of discovery. Many chapters take place on successive days.