My Sister-in-Law is My Wife

Feel bad for little sister, hope she gets it on with her brother in law...

I don’t know how the situation from the title can work, but let’s find out!

I hope she aborts that baby before her sister finds out haha and the cum in the coffee was a nice touch! c:

Well that’s an interesting ending. The sister in law getting pregnant from the Protagonist before the sister (who is his wife).

Impregnation endings are best endings.

The universe where Yosuke always gets it in...

Can we get a Rico book pleaseeeee!

Sorry wifey, it's just impossible to compete with Nee-sans.

That last shot on page 16 just might be Nature's way of telling Yuu and his sister-in-law:

"IT'S PAYBACK TIME!"

... I'll just leave this right here.

Well that's...An interesting title.
So in a way he has a harem? Like, his lawfully wedded wife, and her sister, meaning his sister-in-law...Who is also his wife? Uh...Okay.
That ending though...Well, pregnancy. Interesting.
Also I'm a little bit disappointed his real wife didn't get some action, but this was an interesting release.