Y/N and Mike Wheeler have always been sworn enemies—constant bickering, eye rolls, and competing over everything. The Party is used to their arguments, often placing bets on how long it’ll take before one of them snaps. Mike thinks Y/N is impossible, and Y/N thinks Mike is stubborn and annoying… yet neither can ignore how often they notice each other. When a new threat from the Upside Down puts the group in danger, they’re forced to rely on each other more than ever. Late-night planning sessions and near-death moments begin to change things. Y/N sees Mike’s determination and heart, while Mike starts to admire Y/N’s bravery and quick thinking. Their insults turn into teasing, and their tension shifts into something softer—but just as intense. By the time they realize what’s happening, it’s too late to deny it. Their rivalry doesn’t disappear—it transforms into a fiery, passionate connection where love feels just as powerful as the hate they once had.