Kenji has a perfect life. A house in the city, a well-paid job with a big promotion on the horizon, and a beautiful wife named Airi.

On their fifth wedding anniversary, Kenji takes Airi out for dinner. What should have been a simple celebration turns into something else after a chance encounter with a man from Airi’s past. He knows her. Knows her far too well.

Until now, Kenji had never given much thought to Airi’s life before she met him. After that night, he cannot stop thinking about it. The questions, the jealousy, and the images in his head begin to spiral into something new. A lust he does not fully understand, but cannot ignore.

Fortunately for Kenji, Airi knows exactly how to handle these newfound feelings.

After all, Kenji is about to discover that he married a slut.