Kokoro Ayase works as a school nurse, diligently carrying out her daily duties. Her elegant and beautiful appearance likely draws admiration and affection from many men. However, she has little experience in romance and seems troubled by her lack of intimacy. Although she teaches sex education, her knowledge is limited and lacks practical experience, making it difficult for her to fully convey the subject. She wants to learn more about sex herself, and reportedly her relationship with her husband has grown dull, with their bedroom life lacking excitement.