Sex indecent lesson ♪ ~ Cute daughter to the stepchild of the wife is a pervert candidate!?I'm addicted to outdoor play~

"Kaoru” and "Kyoko" became a couple.
His wife Kyoko is a woman more than one year older than Kaoru, and he has 'Natsuya' as his stepchild.

as a father, kaoru tries to shorten the distance、
She was worried that she would not accept herself because she was around the age of her daughter, Natsuya.

that one day.
Kaoru knows that he has a boyfriend in summer Night and is thinking about his first sexual act soon.
However, although there is some knowledge of sex, it is understood that awareness of pregnancy is also thin, far from knowledge of contraception、
As a father, I decided to give sex education in order to have proper contraceptive knowledge.
And such a mid-summer night says.

"But if you do it someday, you don't want to fail your boyfriend……
　Father-in-law, let me see your pussy for now.
　sex education, right?　you should know how it works, right?」

In this way, the relationship between the two begins to change little by little with this word....

“薫”と“響子”は夫婦になった。
妻の響子は薫より一回り以上年上の女性で、連れ子に“夏夜”がいる。

薫は父親として距離を縮めようと努力するものの、
義娘の夏夜は年頃ということもあり、自分を受け入れてくれずにいることに悩んでいた。

そんなある日の事。
薫は、夏夜に彼氏がおり、近いうちに初の性行為を考えている事を知る。
が、性の知識は多少あるものの、避妊の知識どころか妊娠に対する意識も薄いと分かり、
ここは父親としてきちんとした避妊知識を持たせようと、性教育を施すことに。
そして、そんな中夏夜が言う。

「でも、どーせいつかヤるんなら彼氏相手に失敗したくないからさ……
　お義父さん、とりあえずアソコ見せてよ。
　性教育だよね？　仕組みとか知っといた方がいいんでしょ？」

こうして、この一言がきっかけで、二人の関係が少しずつ変化し始める――。