まさか母・姉・妹の裸（巨乳）で勃起するなんて！家族旅行で久しぶりに一緒にお風呂に入った母・姉・妹の胸が想像以上に巨乳過ぎて、理性を保てなかった僕の股間は痛いくらいビンビンに…。そんな姿バレたくないのに見つかってしまい…。
I never thought I'd get an erection from seeing my mother, sister, and little sister naked (with big breasts) ! When I went on a family trip and took a bath with my mother, sister, and little sister for the first time in a while, their breasts were bigger than I'd imagined, and I lost my senses and my crotch was so hard it hurt... I didn't want anyone to see me like that, but they found me...
