Since moving in with his brother and sister, the first-year student has not had a peaceful day. From the fact that the lewd sister-in-law Suzuki always dresses sexy, stimulating her desire every time she teaches him to learn to many times accidentally encountering sex scenes between the two brothers. In such an environment, he was at an age with a strong desire, so it was understandable that images related to sex always appeared in his mind. When his stamina exceeded his limit and was often solicited by his sister, his appetite exploded very intensely—as a result, an incestuous affair between the two sisters was inevitable.