Iris Hart moves into Apartment 12A with three things: a box of mismatched mugs, a career she almost walked away from, and a silent promise to never let work eat her alive again.She doesn't plan on thin walls.Or the laugh on the other side of them.Or the neighbor who comes with both.Liam Park, night-shift nurse in 12B, has his own rules: fix what you can, don't bring the worst nights home, and never, ever fall for someone whose sleep schedule depends on client feedback.Then a midnight storm knocks the power out, a spilled jar of pasta sauce turns into a shared crime scene, and a Post-It on the wall becomes the start of a new life Iris didn't know she was allowed to want.As Iris rebuilds her career at a healthier agency-and her old boss tries to pull her back into fear-driven advertising-Liam stands on the other side of the wall, offering tea, terrible jokes, and a soft place to land on the nights she can't breathe.But burnout doesn't let go easily, and Liam's job keeps asking him to show up on people's worst days. Between rooftop talks, 3 a.m. check-ins, and the world's slowest "are we doing this?" relationship, they'll have to learn how to love each other without losing themselves again.Because the bravest thing either of them can do isn't falling in love.It's choosing it-daily, quietly, under the same roof.Notes Through the Wall is a cozy, emotionally honest, slow-burn contemporary romance featuring: neighbor-to-lovers tension through thin wallsa night-shift nurse hero and a burned-out copywriter heroinesticky-note rules, rooftop confessions, and consent-forward kissesa healthy workplace arc (no toxic boss worship here)a soft, grounded HEA that feels like finally coming homePerfect for readers who love Talia Hibbert, Emily Henry, and feel-good romances that take mental health seriously.