The third installment of the popular series! My older sister, who lives alone in Tokyo, came back to her parents' house for the first time in a while and said, "I'll wash your back," and wanted to take a bath with me! Even though I refused, she forced herself in. She's cute, has big breasts, and is exactly what I like! In the small bathtub, her soft big breasts touch my body, and she presses against me naked, making me get an erection! I was about to remember that it was bad when my older sister found me... and then she reached for my dick...