Walkure Romanze More&More

Voice actress Lu Xi and writer Shu Yu continue their life together.
After the incident, they became a fan-favored “official CP,” forced to act close at events
Sweet days flow on, small ripples appear, and their bond deepens—until the rejected Twin Souls ending unfolds in reality.

I get the feeling that my wife has gotten more beautiful as of late.
It's a small thorn that's stuck in my side and just won't go away.
Niggling at my conscious that something may not be quite right.
After much deliberation, I hire a private detective to investigate
my wife's activities and I regret having ever thought of doing so...
You see, having learned of your wife's adulterous affair with another man
turned you on, made you burn bright with lust... like a horny beast.
You wish you never learnt this feeling but... at the same time you
wonder how you could have ever been satisfied without it...
NTR... A forbidden delicacy. The dark swirling lust within you beckons...
to draw you into a deep abyss, a never ending fall into cuckold depravity.
Enjoy... as your wife moans and groans in the throes of pleasure...
... with another man.

Protagonist is living a pretty ordinary school life with average friendships. He feels that something is lacking in his life and is struggling with his youthful desires. He's got plenty of material for his nightly wank sessions, but still feels like something's missing. He daydreams about banging all those girls he knows, like the popular girl Manami, the cute junior Hinata, and the sexy senior Ayane. And one day, out of nowhere, one of those babes whispers a naughty proposition in his ear, making him all excited and hopeful about the possibilities. His pink-colored youth is just about to kick off!