Overall- 9/10 Art- 6/10 The art is subpar, there's nothing too special about it. It's pretty average. If the art were better, I'd give the entire manga a 10/10 overall. Characters- 10/10 The characters are amazing, the two protagonist are a 13 year old girl and a "mermaid" who are oblivious to life as a whole. They are extremely well written, the author really makes you feel their thought process, and it shows how different children view the world compared to adults. Story- 10/10 This story is one big metaphor, even the title. This story is amazing in every sense, the story really shows how oblivious children areto the world and how children use coping mechanisms to hide abuse. A big theme in this manga is stockholm syndrome, specifically in children. Overall this manga starts out as a typical shoujo, but very quick takes up seinen like characteristics as eveything comes crumbling down when you realize that being a mermaid is one giant analogy.