http://www.dlsite.com/maniax/work/=/product_id/RJ174224.html
http://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_093640/

002-214: Text
215-427: No Text + SFX
428-640: No Text

Title explains itself, netori.
MC steals his older brother's sexually neglected wife.

Base +11

Once upon a time, MC Keisuke struggles to find a job after graduating from college, and so has to stay at his brother Kazuto's place. Kazuto's wife Eri is openly pissed that MC is in the way of their newly-wed life, to the annoyance of MC.

As Kazuto is always out for work, Eri becomes frustrated and decides to order some "toys" to play with in her own time. Unfortunately for her, MC intercepts the parcel and, like a true netori MC, uses it to blackmail her into letting him "comfort" her.

After lots of wild sex, Eri became so addicted to MC's dick that she ends up being the one starting the sex to MC's surprise (148), going so far as to shag in front of Kazuto who is taking a nap on his sofa (168).

The oblivious Kazuto sees it as a sign that his wife is finally getting along with his brother like "family", and so decides to take on an assignment where he'll be away for 2 weeks without worrying MC and Eri will fight. (184)

MC and Eri of course use these 2 weeks to get as pregnant as possible.

And they lived happily ever after.

The End.

Base +7, Thanks +7, defrdefr +7, stupid army +7