This is a game where you do night crawling without waking up your sister in law. Lick, rub, pluck and insert and finger-bang. ...use a variety a way of touching to conquer your sister-in-law. Story The leading character is a virgin, reserved, "otaku". His work is home security. By strange accident, his father remarried and he got a new family. ...My sister-in-law looks at me really coldly. However, I am panting and suffering with mental anguish over the sister-in-law in my new family. I couldn't stand it anymore so I decided to do night-crawling on __/__/20__. If I am found out she will look at me even more harshly, and treat me as sheer waste. Source: The Game Website.