Juri, Makoto, Mitsugu, and Kanon serve on the student council of a prestigious girls' high school and are the school's flowers, admired by all for their beauty and excellence. They are the symbols of purity of the school, like the Madonna Lilies, the white lilies dedicated to Mary, the Holy Mother. Yet, there is a hidden side to these girls: Juri's life revolves around a forbidden love; Makoto is involved with sugar daddies, and so forth. The fact that these white lilies are getting stained by their own sediment cannot be stopped by anyone any more.