Prologue

Follow the story of a girl who swore to never cross the line and to just stay as the "best friend" of the person who's been the cause of both her happiness and sadness. But as time passed, her feelings were no longer shallow, as they were already as deep as the ocean floor before she even noticed them. Will she be able to hold onto that promise and not cross the line when she's losing the person that she loves to someone else? Or will she gather enough courage to cross their boundaries?