Slave/Master ~Kanojo to Kanojo o Shibatta Kusari~

Shuusuke was sexually unsatisfied and tired of the game. That's when his younger twin Yuusuke asked for advice: "How do you get all the way to making it with a girl?" Shuusuke's heart lifted at his brother's enthusiasm. But not to help. He saw a chance to revive his own libido by stealing away the subject of his brother's love.