Three sisters, Ai, Mai, and Mii, along with their housekeeper android Mea live in a large, time-travelling house. The story follows the sisters' journey through time and space as they, with the assistance of communicating dandelions (referred to here as "popotan"), seek out a certain mysterious someone believed to hold the answers to their questions. Emotions begin to run high as the girls are challenged by an inherent fact of their situation: they will abandon anyone they meet... or worse, befriend. Three sisters. Ai, Mai, Mii and their housekeeper android Mea live in a large old house which travels through time. The story is about the sisters search for a certain person and the affects moving through time has on the sisters as they have adventures and make friends only to have to leave again. It also shows throughout the series the affects the sisters have on the lives of the people they have interacted with.