Y/N has known Damian their whole life. Same house, same holidays, same background of each other’s existence for as long as they can remember. But there was always Sarah between them, always something pulling their attention somewhere else, always a reason it never went further than a nod across the kitchen. He had a rule. Sarah’s friends were off limits. Then one party, one absence, one conversation that wasn’t supposed to mean anything. The rule stops making sense and Y/N is starting to think it never did.