Yu Xiyue is a good girl in the eyes of everyone, an elegant and literary beauty, but was born in a family with a very harmonious sexual relationship between husband and wife. She has also accumulated a lot of sexual experience in spying intentionally or unintentionally... Until one day, the forum web link sent her by her best friend opened a brand new door for her... What will the girl who tried to train herself for the first time become?What kind of danger will her self-training show adventure?