The incestuous love story of two crazy sisters, Kitayama and his younger brother in adolescence. Kitayama possesses an attractive form and excellent sex skills. The younger brother is no less than his sister, to the point of actively soliciting his sister to have sex.
She had a younger brother, knowing that he didn't have a girlfriend, and had to turn his hands frequently, so Kitayama decided to give him a day today to satisfy herself, she would use all her skillful sex skills to bring her younger brother to Mount Everest.