A guy named 'Taro' went to Mizuki's house and met her sister, 'Sarina.' Although Sarina is a downer and cool, she tempts him with dirty talk and erotic tricks where Mizuki can't see! If he gets an erection, he ends up getting jerked off or blown and made to cum while hidden from Mizuki. Sarina's temptation escalates to sex! Unrelenting temptation shatters reason... Internal ejaculation won't stop...
