Seduced by My Sister-in-Law: A Frustrated Mature Woman’s Special Lesson

Synopsis

One summer, Mamoru—a ronin student preparing for his college entrance exams—faces an important period in his life.

Then his older brother Keiichi returns home on break, bringing along his wife Yumi.

When Mamoru first met Yumi, he thought to himself: “Is there really someone this beautiful in the world?”

Ever since, he’s harbored a secret admiration for her.

“I’ll be staying for three days, so please take care of me!” she says cheerfully.

And so begins a summer with the woman of his dreams…

—

[HEROINE]

Name: Yumi

Voice: Amemori Riko

Appearance: Captivating beauty with an ample bust

Profile: Wife of Mamoru’s older brother Keiichi. Elegant and refined, she once worked as an event companion in her younger days. A prestigious university graduate with excellent academic ability. She visits her husband’s family home—where Mamoru lives—for the first time in a while.

[PROTAGONIST]

Name: Mamoru

Profile: A rural ronin student facing upcoming entrance exams. He’s never had a girlfriend and is a virgin. Ever since meeting Yumi, he’s been captivated by her beauty.

[HEROINE’S HUSBAND / PROTAGONIST’S BROTHER]

Name: Keiichi

Profile: Yumi’s husband and Mamoru’s older brother. An elite who attended a top-tier university and works for a major corporation.