Futaimo Days ~Onii-chan, Naisho de Shiyo♪~

"Brother-in-law." "Brother-in-law♪" No matter how you look at it, these two are the mirror image of each other. They are my little sisters, or rather, my little sisters-in-law. My father, who had lost his wife early and struggled to raise me, remarried a beautiful widow in a similar situation. The widow... My mother-in-law had two cute daughters. We are going to be brother-in-law and sister-in-law a little apart in age. When we decided to live together, “I wanted a big brother♪” I was happy to receive such a welcome, but maybe they were being a little too clingy. We were practically lovers now. "He's mine!!" "He's mine!!" Even real siblings—no, real siblings—wouldn’t be this attached to each other, but I can’t say to stop it. They are a little worrysome, but my little sisters are cute. They may be my sisters-in-law, but I don't feel bad to have cute girls like and look up to me. One night, those days continued. As I was taking a bath, the door suddenly opened...and my sisters-in-law came in! Just having my sister-in-law come in while I'm bathing would be incredibly troubling, so why are the two of them completely naked...!? And no matter how you look at it, it looks like a contraceptive, a condom. I was at point-blank range, lost in thought as to what to do. Before I knew it, my sisters-in-law came closer... [Based on MTL of DLSite's description.]