He wasn't supposed to fall for the neighbor... especially not the one who makes his heart race and his life a little braver.Oliver likes rules. Rules keep things simple, predictable, and safe - which is exactly how he prefers his quiet office life. But everything changes when Nate, the ridiculously attractive gym-obsessed neighbor, steps in at the exact moment Oliver needs someone in his corner.Nate is confident, calm, and far too observant for Oliver's comfort... especially when he starts noticing the shy office guy watching from the sidelines - both in the courtyard workouts and online, where a mysterious commenter seems to understand him better than anyone else.Between awkward training sessions, flirty livestream comments, and one very complicated workplace situation, Oliver finds himself growing stronger in ways he never expected. And when he discovers courage he didn't know he had, the line between neighbor and something more begins to blur.But falling for the guy next door means risking everything - his comfort zone, his heart, and maybe even the rules he's always lived by.Roommate Rule #4: Don't Fall for the Neighbor is a slow-burn MM romantic comedy filled with humor, healing, and swoony moments - perfect for readers who love shy office guys, protective gym bros, found confidence, and kisses that are absolutely worth the wait.