Sin of Lust

Living under the same roof with the seductive, married Rena and the sweet, charming Erika seems like something anyone would envy, yet it pulls me into a dangerous web woven from their desires and hidden secrets.

Whether by accident or temptation, I keep catching glimpses of their private moments at work and at home. Secrets long buried begin to surface, layer by layer.

As I dig deeper, my feelings toward them twist into something far more complicated... and far more dangerous.

And my own desire is slipping out of control.

In the end, will all of us fall together into the abyss of desire?

Main Characters

Shiraishi Rena

My married boss with a cool, aloof elegance and a touch of arrogance—who also happens to be a well-known romance novelist.

Because of a misunderstanding, she holds a deep hostility toward me and often makes things difficult at work.

But her true intentions… seem far more complicated than what she shows on the surface.

Kamishiro Erika

My sweet, charming coworker, Rena’s younger sister-in-law and the junior accountant of the company. She treats me with warmth, frequently relying on me and asking for my help.

Yet beneath her obedient, innocent exterior lies a side no one ever sees.

Game Features

• Over 50 event CGs and illustrations.

• 11 sets of animated H-CG scenes.

• Experience a forbidden entanglement with Rena and Erika through over 200,000 words of finely crafted storytelling.

• Freely explore a map filled with side stories, optional events, and collectible elements.

• Discover various sex toys that can be used in special interactions with Rena and Erika.

• Your choices will shape the fate of Rena and Erika, leading to multiple endings.

• All major story scenes and H-scenes feature high-quality full voice acting.

Other Characters

Kamishiro (Shiraishi) Seiya (Left)

Rena’s newlywed husband, who married into the Shiraishi family. Ambitious and determined, he dreams of publishing his own novels.

However, Rena’s attitude toward him is far from warm, leaving their marriage tense and distant.

Kuroe Kazuko (Middle)

The Shiraishi family’s housekeeper, meticulous, composed, and polite, yet difficult to get close to.

Though she appears cold, she seems to quietly look after everyone… including me.

Takahara Sakuta (Right)

The Shiraishi family’s chef. Born mute, he carries a gloomy, withdrawn temperament that makes him hard to approach.

His hidden, intrusive fixation on Erika sends a chilling sense of dread.