Otona no Omocha

It's the classic story of a man on the pursuit of his destiny...and the two sisters who pull him away from those dreams and into their raunchy, tortuous games. These girls are on a mission; they're thorough and determined to uncover every mystery of this man's sexual capabilities, even if it takes them all night long.

Due to a blunder at work, Kyosuke, who came to Tokyo with dreams of becoming a garcon, ends up becoming sex slave for a week for the CEO of an underwear company, Ai, and her younger sister, Mai… Is it pleasure or pain? Where does Kyosuke’s future lie?!

(Source: Project-H)