GET the siblings on their shopping trip. The sister seems to be working in medical administration, and the white coat suits her. Under the guise of a plan to check their sibling relationship, the conversation starts with each other's favorite foods and gradually escalates to questions like 'Do you have a boyfriend?', 'Have you ever kissed?', 'Have you ever masturbated?' For the two who seem to be getting along, the questions become more explicit, leading to a situation where they are sitting naked together. Despite her brother's off-target answers, the sister, while exasperated, says 'Oh, big brother,' showing she likes him. So, you really love your big brother, huh? Laughing, the sister, with her large breasts, is fondled, and the brother, without restraint, becomes erect during their naked sitting session. The cute sister, saying 'No, no,' envelops him with her private parts. Not stopping at just sitting naked together, they end up having sex and even climax inside her.
