Leviathan

The sea level rose to cover the continents. On a planet where dry land can no longer be found, the young Bota's family lives on a small boat and wanders the vast ocean. A harpooner who hunts in deep sea water may be the prey of a monster at any time, those who only appear at night. Will Bota and his family ever make it to safety and escape this aquatic hell?... And who in the world is Kana?! (Source: Toomics)

Leviathan is originally a webtoon series which was published in book format by Maeum-ui Sup (마음의숲) from March 22, 2022 to October 4, 2022. The series was published digitally in English, French, Spanish, German, Portuguese, and Italian by Toomics. The Toomics English release split the original webtoon chapters in halves. It has also been published digitally in English and French by Webtoon Entertainment.