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LINE Manga

Japan's largest digital comic service, operated by LINE Digital Frontier (a WEBTOON Entertainment company). Anyone can post original manga or webtoons free via LINE Manga Indies; the editorial team scouts posted works for paid "Trial Serialization" leading to pro debut (e.g. Senpai wa Otokonoko started as an indies submission).

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LINE MangaJapan

LINE Manga — Direct submissions

Open posting service inside LINE Manga; requires a LINE account. All posted works are reviewed by a dedicated team, with monthly prize rankings, webtoon one-shot challenges, and scouting for Trial Serialization (16-week paid trial runs that can become official series).

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LINE Manga app