Nono Mizusawa became a nurse seeking a stable career, and though busy with daily duties, she always greeted patients with a smile. The hospital director told her, "Nursing is the ultimate service industry," but she didn't fully grasp his meaning at first. However, overwhelmed by mounting work-related stress, she began a relationship with a male nurse, which suddenly ended, leaving her sexually frustrated. During a night shift, she conceived and carried out a forbidden act. That experience became a turning point, helping her finally understand the director's words. Gradually forgetting her professional boundaries as a nurse, she began pursuing intimate relationships with one patient after another. Emotions and desires intertwine along this path, leading to unexpected developments.