"Have you had sex with your sister yet?" Even though my girlfriend is nearby, her plain and serious-looking sister presses herself against me and whispers dirty words into my ear while I'm being violated! When I go to my girlfriend's house for the first time in my life, I meet my sister Kanon-chan, who wears glasses. As I'm waiting for her cooking, Kanon-chan presses her beautiful breasts against me and whispers, "I've studied a lot of naughty things..." and slowly slides her hand into my crotch...