every man is attracted to an adult woman at least once... because i was in a slump with my girlfriend, i had fallen in love with her big-breasted older sister. one day, my girlfriend went on a cheating trip with a senior from college... i couldn't hold back my feelings and confessed to her older sister, who was cheering me up. "i'll be your girlfriend for just three days." i fucked all day and all night with her sexy, big-breasted older sister who gently enveloped me for a limited time, repeating forbidden sex as i pleased―――.