He was never supposed to meet her. Ryder Stylas has spent five years being loyal to his best friend, Zackary Russo—through everything. But one summer changes everything when Ryder accidentally meets the one person Zack never told him about: his twin sister. Y/n is everything Ryder didn’t know he was missing—funny, effortless, and impossible to ignore. What starts as harmless moments turns into something deeper, something dangerous. Because the more Ryder falls for her… the more he risks losing the one person who’s always been his family. And some lines aren’t meant to be crossed— no matter how badly you want to.