Naho is a housewife who does her best to do housework for her beloved husband. One day, Naho asks an electrician to repair the kotatsu, which is not in good condition. A few minutes later, as Naho crawled under the futon of the kotatsu and looked at the crotch of the electrician working with his lower body exposed, a strange feeling began to grow in Naho's heart. And, because of her dissatisfaction with her night life, Naho can't help but straddle his crotch. From that day on, while riding a horse, I became obsessed with the charm of the cowgirl position where I took control.