My girlfriend, who I live with, went on a family trip for four days. A sudden visitor appeared at my home where I was lonely waiting for her return… It was the figure of her sister, Saeko, who couldn't go on the trip due to work. 'Why... how come...?' Ignoring me as I was bewildered, Saeko started to seduce me... The record of the four days I spent fucking like crazy while my girlfriend was away on a family trip.
