During the summer vacation, Erina, a female college student, was returning home. - Erina, who is sweaty due to the intense heat, finds out that the bath in her house is out of order, and at the recommendation of her mother, she goes to the old man's house behind her to rent a bath. - The old man who was upset by her sensual growth of Erina who resumed after a long time can not suppress her strong desire that springs up for the first time in decades and attacks Erina with her momentum. - And, "In such a countryside, if rumors spread a little, mothers will not be able to go out ...", taking advantage of her weaknesses.