[mangaupdates](https://www.mangaupdates.com/series/fylyljq), [LINE Webtoon](https://www.webtoons.com/en/sf/harmonia/list?title_no=3253). | Info | | | -------- | ---------------------------------------------------- | | Author | YOON | | Artist | JINU | | Genres | Action, Mystery, Psychological, Sci-fi, Supernatural | | Type | Manhwa | | Year | 2018 | | Chapters | 1-111 | **Synopsis**: Divers discover an immortal jellyfish in the Caribbean Sea and the key to immortality is seemingly at hand for humanity with the development of Harmonia, a pill that keeps its consumers looking young as long as it is taken daily. However, a fatal flaw is discovered when a singer experiences its side effect while on TV, rapidly aging until death. Trapped on Nakwon Island with his family, islanders he’s known all his life, a group of church volunteers, and a dwindling supply of Harmonia, will Junam be able to escape alive?