It's not that hard to understand, actually. The backstory is fairy simply. At some point in the past a huge earthquake made almost all landmasses of the world sink into the ocean. Now only a tiny portion of Japan is left. In other words, this is a post-apocalyptic world.
There is a supernatural element too. Spirits of the death and other supernatural entities seem to dwell in the sea. Probably the spirits of people who died during the earthquake or other disasters. The characters who are aware of these spirits call them "sea oddities."
Minato, the protagonist, is special because she seems to be possessed by a mermaid sea oddity. Maybe this is the reason she can see the true nature of the sea oddities around her.
Now in the latest chapters they introduced the two major factions at the academy. The Halcyon team who seem to regard the sea oddities as curses from the sea and are openly hostile towards them. The Halcyon team seem to be the main faction in the academy, sort of like a student council. On the other side there's the Guardian Club. They seem to have a more positive view on sea oddities. The president of the Guardian Club got interested in Minato since she saw her mermaid possession sea oddity in chapter 3, and they recruited Minato into the club.
I take it the rest of the story will focus on the ongoing conflict between the Halcyon team and the Guardian club, with Minato at the center of it all.
last edited at Mar 22, 2022 3:51PM