The weather coldly struck to the bone and blizzard agressively fell, white all over the place as far as eyes can see, it's all a common sight in the Artic. A lone merman uncaringly swim in the Artic ocean. With swiftness and elegance he go through the never-ending water, as if he can't feel anything else.

His name is Shoto Todoroki, the only mermaid in this world. Not only mermaid's skills and attributes, he also possess a half-fire half-ice quirk. Strong and tactical yet kind and protective, his name is both feared and adored for every human. Because he's smart at hiding himself, he's like a legend amongst people.

Today, he's swimming again as usual, trying to find something to do.