on the high seas there is a fight between two pirate ships, the Bakusquad crew with the angry captain Bakugo Katsuki with his crew Kaminari, Kirishima, Mina, Jirou and Sero and we have the Dekusquad crew with heroic captain Midoriya Izuku with his crew Todoroki, Momo, Uraraka, Iida and Tsuyu

both ships are in search of a legend...a mermaid/thirty