【a book about how to be a good wife】A book about creating a pre-existing relationship with a sister seven years younger than you who has a high level of legitimate marriage.
[Ranking]24 Hours:#8, 7 Days:#18, 30 Days:#37
Title：A book about creating a pre-existing relationship with a sister seven years younger than you who has a high level of legitimate marriage.
Maker：a book about how to be a good wife
Release date：2020/01/08
Genre：sister, pregnancy/impregnation, breastmilk, Childbirth, Adultery, Incest
A brother and sister whose parents are often absent and who are as close as newlyweds.
In fact, the older brother has been secretly wanking off his younger sister, Yui, for years.
But one day, by chance, it is discovered that the two are in love with each other…?
This is a book about a brother and sister with 100% purity that takes brother and sister sex seriously.
This book is about a girl who is pregnant and breastfeeding.
Number of files: 21 (cover + 20 pages of main story)
