Starting high school was supposed to be a fresh beginning after a tumultuous middle school romance. However, my ex-partner ended up as my stepsibling, turning my sanctuary into a nightmare. Constantly encountering her at home, in school, and even in class, I can't escape her presence. Despite her claim of being the elder sibling, I refuse to concede. In this new family dynamic, I stand as the older brother, determined not to be overshadowed. While we may maintain a facade of sibling camaraderie for our parents' sake, the truth of our failed romance lingers, highlighting our incompatibility. Our relationship will never revert to its former state, as we acknowledge our differences and strive to navigate this familial bond with a newfound perspective.