In a father-son household, Shota often orders food delivery due to his father's frequent absences. The delivery sister had huge breasts. Shota became obsessed with her breasts and ordered her again the next time. Feeling lonely without his mother, Shota invited the sweaty sister to take a bath together. While washing each other, his penis grew hard, and he demanded that she tend to it. He then accidentally inserted it into her vagina. As it turns out, the sister was also a gravure model. Using photo shoot practice as an excuse, he indulged in lewd pranks. The overnight stay with the sister's enthusiastic sex is a must-see.
