A younger sister who secretly takes out her brother's erotic books and masturbates. She gradually escalates and begins to put things in her room. She was unable to get it out of her vagina as a result, and it was her brother who was called to the emergency. At first, she desperately tries to help her sister by sticking her finger into her pussy, but halfway through, her sister begins to feel something strange... In addition, her sister noticed me secretly getting excited.
