i'm teaching my husband sex secretly to my brotherinlaw... Otaru-hibiki

The nurse's cracks were concerned about her brother-in-law who had become sick. I feel pained by the appearance of my brother-in-law who lives in a energetic way, and I want to be able to do something about it. One day, Hibiki learns that his brother-in-law was watching AV. And he decided to give sex education to his brother-in-law, as a sister-in-law and as a nurse, for the sake of her brother-in-law who did not know the woman's body yet.