Tsuma ga Karada o Hiraku Wake ~Shiranu Ma ni Oi kara Sex Kaihatsu Sareteita Ai Suru Tsuma~

Synopsis

January, just shy of their third wedding anniversary.

One message arrives at the Asamiya household, where the happily married couple lives together.

It's from Kazuki, the nephew of the wife, Kanana, asking if he could stay at their home for a little while.

To be honest, Shun, the protagonist, thinks to himself, "After all, we finally have this life just the two of us..." — but since it's a child Kanana has doted on since long ago, he ends up agreeing.

When they meet, Kazuki is a polite and gentle young man, and Shun feels relieved. Life with Kazuki — who is thoughtful and even helps with the housework — blends in far more smoothly than he imagined.

Around the same time, Shun's work becomes busy, and he finds himself away from home more often.

Still, for his wife's sake... for their future, for having a child with Kanana, he keeps pushing forward.

—The small distortion that unfolded behind the scenes.

Without ever noticing it growing larger and larger...

Things that had never been done to her by her husband.

Things she had never done for her husband.

And the first time—

...the body of his beloved wife is slowly being eroded.