https://www.dlsite.com/books/work/=/product_id/BJ351578.html
As always, please support the artist and buy his works.

Sexy cohabitation with my sister-in-law! ~Suck my breasts! Lick it! ~ [18+]

“I was masturbating while thinking about my sister-in-law!”
Yuki, a college student, moves in with his sister-in-law Haruka when his brother goes on a business trip.
She has a calm and cheerful personality, and the allure of a married woman with a sexy body makes the virgin Yuki feel uncomfortable....
One day, Haruka finds a magazine under his bed, a magazine about having sex with his sister, and she begins to punish Yuki with a naughty punishment.