A serious conversation with Rosé's older sister replayed in your head; it was from a long time ago, when you'd first decided you were serious about each other: "She loves you to death, you know. Maybe too much... I want you to promise me one thing." "What's that?" "If there comes a day you have to break up with my baby sister - you need to talk to me first. If it's really not working out, I need to be there to help you let her down easy. Because it would crush her. But I hope it never comes to that." "I hope so too. I want to spend forever with her." "Y/N - promise me." "Right. Ok, I promise Alice." _______________________________________________ A Blackpink Rosé x Reader story. Male or female reader (gender neutral y/n).