She Would Never Know (Bahasa Korea: 선배, 그 립스틱 바르지 마요; RR: Seonbae, geu ripseutik bareuji mayo; lit. Senior, Don't Put on That Lipstick) ialah siri televisyen Korea Selatan yang dibintangi oleh Won Jin-ah, Rowoon, Lee Hyun-wook, Lee Joo-bin dan Lee Kyu-han. Drama ini berdasarkan daripada novel web 2017 Senior, Don't Put on That Lipstick oleh Elise (Elize), ia ditayangkan di JTBC bermula pada 18 Januari 2021.