why the fuck is everyone brother and sister is this sibling romance. fix this shit

No this is not an incest story, but the word "oppa" was translated in literal as brother in english. Oppa is also an endearment term for boyfriend in korean

In korea, there's no need to be siblings to call each as sister or brother (oppa, unnie, noona and hyung), since the way it used in a form of respect for someone who is older