It’s been 18 years since we got married.
Keiko, my loyal and devoted wife, is the kind of woman who dedicates herself entirely to her husband—a rare type these days.
Our life together is peaceful, ordinary… and I thought that was what happiness looked like.

But lately, something feels… unfulfilling.
I’ve started to find my dutiful wife… boring.

One day, I confront Keiko and tell her I want a divorce.

Desperate not to lose me, Keiko begs me to stay, pleading with everything she has.
She believes the fault lies entirely with her and is ready to do whatever I ask to make things right.

And now, taking advantage of her vulnerability, my training of Keiko begins…

[Translated from the official website]