Ninyousei no Takai 7-tsu Shita no Imouto to 2-rime wo Kosaeru Hon

What happens when a horny brother and sister have lots and lots of creampie sex!?

Well, little sister Yui had her brother's baby, that's what happened.
Now, she's too busy taking care of the baby to take care of her sexual needs!
However, her parents arrange for her and big brother to go on a honeymoon trip!
It's time for some more nonstop sex!

A 100% pure older brother & younger sister book that thinks seriously about what happens when a horny brother and sister have lots and lots of creampie sex!

(Source: DLsite, official)