Shiho got married and started a new life with her husband and father-in-law. She dreamed of a happy married life, but the reality was far from ideal. Her husband came home late every day from work, and their married life was not good. During the day, she endured bullying and sexual harassment from her father-in-law. And then... Shiho was driven to the brink by the repeated, insidious and persistent sexual harassment, and, combined with the frustration of a sexless marriage, she finally offered her body... Before long, Shiho's body became immersed in the forbidden training in broad daylight.