A beautiful older sister and her virgin brother compete in a game of rock-paper-scissors with a huge prize!? "There's no way I'd be excited about my older sister!" says the virgin brother, but he gets a rock-hard erection and is in a lustful mood. The older sister also blushes and gets turned on by her brother's huge cock. (^^;) A close older sister and younger brother take their virginity and get creampied. Big sister Umi and big sister Mayu.