Younger sister Mayu and older brother Kenji attend the same school. The two of them secretly had a physical relationship. However, my younger sister is called 'tsundere', who behaves strangely with her brother outside. One day, Kenji heard a rumor that Mayu had a boyfriend in her class. Kenji couldn't contain his jealousy, took Mayu everywhere and had vaginal sex everywhere in school.
![SDMF-006 The older brother became jealous when he discovered that his beloved sister had a boyfriend](https://cdn-01.w3img.com/images_new/full_10_size/5cpXRBZ1gA-6x_iswHoOlIaqJPuyjSrKY2D.jpg)