After finding out that her younger brother was molesting people and taking upskirt photos, the sister decided to use her own body to make him stop, and resolved to ride trains and buses together. At first, it was just about letting him touch her, but soon he couldn't hold back any longer and put his hand inside her underwear. As she struggled to suppress her voice so as not to alert those around them, her brother's excitement grew, and when he took out his penis, she hesitated but reached out for him anyway.
