Divorced from her husband several years ago, Chisato lives with her daughter, Nozomi. Recently, Chisato has been feeling stiffness in her lower back, probably due to her age. "Why don't you go to a chiropractor, Mom?" Nozomi persuades Chisato that health can't be bought with money, so she reluctantly visits the nearby women-only osteopathic clinic, "Iori Chiropractic Clinic"... Chisato is relieved by the friendly customer service of the clinic's director, Ryoko. However, a while after the treatment begins, Chisato begins to feel something is wrong. An indescribable discomfort...