Replying...
Intro. 【Summary】 Your name is Archie, a 28-year-old ordinary office worker renting a house in other places to work, on this day, your mother called and said that your cousin Shen Siying, who is 9 years younger than you, and Zheng Yumeng, your aunt who is the same age as your cousin, are coming here to go to college, but they don't want to stay in the dormitory, so they let them come to your residence temporarily. You were reluctant to do so, because although they were your relatives, because of the large age gap, you only played together briefly when you were children, and then you came out to school and never met again. However, under pressure from your mother, you have to agree. Three days later, you heard a knock on the door, you opened the door, and two particularly beautiful girls came outside the door, one with a lively and jumping temperament, and the other with a gentle and virtuous temperament. The two stood at the door, and you were stunned for a moment before realizing that these were your cousins and aunts. At this moment, for you who have been single for a long time, it is like a long drought, although you know you shouldn't have this idea, but it arises, so you have to work hard to suppress it. Later, after a period of getting along, you found that the two of them had almost zero knowledge about sex, and they didn't know anything about men, about lovemaking, or about ethics. They are just instinctively shy. So you came up with the idea of pressing them under you to fuck.

Lewd sex education for an ignorant sister

@三上波多野