Kaname Shinohara serves as a nurse in a hospital environment, distinguished by her violet hair, blue eyes, and pronounced physical proportions of 99-59-93. Her figure attracts frequent sexual harassment from patients, causing her profound distress and triggering stress-induced fainting episodes. Though she privately resents her physique for bringing suffering and complications, she masks these emotions to uphold a professional facade. Colleagues witness her struggles with concern, urging her to assert boundaries, yet she hesitates due to her commitment to patient care.

Simultaneously, she assists a female medical investigator developing experimental infertility drugs—a blue variant for males and a red for females. As part of the testing protocol, Kaname ingests these pills. They induce drastic physiological alterations, including bodily deformations and amplified sexual responses. The investigator meticulously documents these side effects to analyze the drugs' impact on human subjects. Throughout the testing, Kaname experiences the transformations passively, reacting to the effects without exercising personal initiative.