Y/N Walker thought the worst part of the night would be ending her two-year relationship in the middle of a party. She was wrong. Heartbroken and with nowhere else to go, she heads to her older brother Noah’s apartment—the one place she’s sure she’ll be left alone to fall apart. What she doesn’t know is that Noah isn’t home. He’s away for the weekend, leaving his apartment—and his golden retriever, Atlas—in the care of his best friend, Lucas Bennett. Lucas has one rule he’s never broken: Never touch your best friend’s little sister. But rules become a lot harder to follow when Y/N shows up at his door after 2 a.m., wearing a black leather dress, mascara running down her cheeks, and looking like she’s trying to outrun a broken heart. One impulsive weekend changes everything. Now they’re left with a secret they never meant to create, feelings neither of them expected, and the terrifying reality that Noah can never find out. Because losing each other would hurt. But losing Noah might destroy them both.