The protagonist, you Komiya Takahisa works for a major publishing house. He has a wife, Sakura, two years his senior, who is a busty, pure-looking beauty and his former colleague. One day, while you and your beloved wife, Sakura, were enjoying a harmonious life, you were ordered by your superior to entertain the renowned writer, Haramura Seizo, along with a senior editor, to commission him to write a book.
You've had several encounters with Haramura, and his frequent sexually harassing behavior and lack of "values update" have led you to secretly despise him. However, all of Haramura's books have been bestsellers, so your boss is determined to get him to write for the company.
After an entertainment session at a high-class club, Haramura asks to meet your wife and then tries to continue the entertainment at your home. Knowing that Haramura had also sexually harassed Sakura, your wife who used to work at the same publishing company before getting married, you hesitate. However, Haramura forces his way into your house, where Sakura attends to him solicitously. Feeling guilty towards your wife, you succumb to exhaustion and pass out drunk after a long day.
You wake up slumped on the kitchen table. Haramura is forcing himself on Sakura. Stunned by the horrific scene, you are too shocked to react, watching through a drunken and distorted vision. Sakura, considering your position at the publishing house and fearing Haramura’s displeasure, is unable to strongly resist and is forced to kiss him. Then, to your utter shock, Haramura escalates his demands, taking Sakura out into the hallway where he forces her to perform fellatio on him. Peeking through the crack in the door, you witness Sakura kneeling before and servicing Haramura's far larger and stronger penis. Overwhelmed by a maddening mix of jealousy and arousal, you cum, experience the greatest pleasure of your life, and then lose consciousness.
The next morning, you woke up in bed as usual. Sakura is in the dining room, preparing breakfast as she always does. An ordinary day, ordinary happiness, what you've gained… confronting this untarnished reality, you convince yourself that last night was a bad dream. But you can't deny a small, dark stain, like a tiny blemish, remains in your heart.
Carrying this "stain," you go to work, only to be told by your superior that Haramura spoke highly of you to the company, saying he'd only accept the writing assignment if you were the main editor. For an editor in their twenties like you to be appointed main editor is an extraordinary promotion, even considering Haramura's standing as a writer. And so, you find yourself closely involved with Haramura, whom you thought was just a character from a bad dream.
In the process, you don't know that deep, dark shadows will fall upon your beloved wife's past and present. A refined, kind, gentle wife with exquisite beauty and a stunning body—the envy of everyone. You will witness a side of your wife you never knew, hear a voice you've never heard… You'll see her indulge in animalistic coupling, different from the lovemaking you share… Her large breasts and buttocks swaying wildly, emitting vulgar, ecstatic cries… Is your beloved wife a lustful woman hiding behind the mask of a pure wife…? Or is she a beloved wife wearing the mask of a lustful woman to protect your happiness…? You are about to find out…