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Millie's Library Inc. (CEO Jaewook Jeong), founded in 2016, is Korea's leading subscription-based reading platform. It offers unlimited access to about 230,000 e-books—from bestsellers to new releases—plus webtoons, web novels, audiobooks, chat books, and object books, all for a flat monthly fee. Partnering with around 2,700 publishers, Millie strengthens its competitiveness through in-house Millie Original IPs and secondary content. Beyond B2C, it has grown via B2B and B2B2C channels such as telecom bundling, completing partnerships with all three major Korean carriers (KT, LG U+, SKT). As the No.1 player with about 61.8% share in the e-book subscription market, Millie was listed on the KOSDAQ in 2023. In 2025, it launched "Millie Story" for unlimited web novels and webtoons, and "Millie Place" to expand reading offline, evolving into a comprehensive online-offline content platform.