BF-567 While her girlfriend was away on a family trip for four days, Saeko Matsushita was crazy about creampieing her older sister.

My girlfriend, who I live with, went on a family trip for four days. As I was lonely and waiting for my girlfriend to come home, I suddenly received a visitor... It was her older sister, Saeko, who was unable to travel due to work. Why...why...? While I was confused, Saeko-san seduced me... A record of my girlfriend being crazy for four days while she was away on a family trip.