To save her fiancé who suffers from a rare disease, Koi becomes a nurse. However, she is unable to secure the treatment fees and after much conflict with the director, signs a 'sex toy' contract. She endures unwanted climaxes until his illness is cured. But the director's demands escalate to performing acts by his sleeping side. Even though it should be absolutely disgusting! Her reason begins to numb in this abnormal situation of forbidden pleasure, and dramatic changes occur to her･･･
