Mom’s Love Letter, a novel by author Song Yoo-rim, is a heartwarming, slice-of-life drama about Dahyun, a 37-year-old single father who lost his wife, his young child Hyun-seo, and Yeon-seo, a 29-year-old babysitter, as they come together to redefine family.
Billed as an uplifting fairytale for adults navigating modern love, the title gained rapid commercial traction upon release—advancing to Naver Webnovel’s Best League just 10 days after debuting on the Challenge League. It emerged as a standout hit in late 2022, amassing over 260,000 cumulative reads and consistently ranking in the platform's Top 30.
As of 2026, the IP is expanding its market reach, with the paperback edition leading the release followed by an upcoming eBook launch.