Hell's Boat 136 is a Manga/Manhwa/Manhua in english language, GORE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

In a world where wealth disparity has been increased by the Alpha virus pandemic, Isamu Kouyama learns Vovinam, a Vietnamese martial art, from his coworker, Le Ahn Cong. Isamu signs up for a volunteer cruise hoping to profit, little does he know what this ship has in store.