Hiroki has been fighting sickness all his life, until one day when a mysterious nurse appears at his doorstep. She smiles and says, "You don't have to worry anymore. My name is Maria, your private nurse. I've come to cure you."

Maria uses all her skills to heal your body as well as your spirit. But who is this mysterious nurse, and where did she come from? What about Ayano, your friend since childhood? A unique game of love, sex and healing by one of Japan's top bishoujo game companies.