Part of Ridibooks and Manta, most of their series will release on Manta before the Korean release.
As of 2023 it seems that Surreuk Comics is the Korean side of Manta Comics for their own publishing series.

And Manta Original Webtoon will be release on Ridibooks for its Korean release, example The Paper Menagerie is Manta Original

List of Surreuk adapting adult novels into all-age webtoons;

1. Under the Oak Tree
2. Traces of the Sun
3. Disobey the Duke if You Dare
4. Evangeline's Sword
5. The Dilettante
6. The Tainted Half
7. Mokrin