- It becomes mine only while my sister goes on a business trip! - The runaway drama of "Karen" who grasped the weakness of her sister's boyfriend! - Put up with masturbation and sex, have sex many times while your sister is away, and feel good together! - Lift the ban on abstinence and get into sex as if you are abnormally seeking each other and devouring each other! Definitely the best masterpiece in the history of the series! Cheating relationship with her sister! I wasn't cheating, I was serious ...! - A few days of piling up my body and squirming more than I can count! I can't go back! * The contents of the recording may differ depending on the distribution method.