While at sea with the rest of his ship mates, Sailor Spain meets a mystic creature,at who he mistakes for a mermaid, he immediatly falls in love with, But Human and Mermaids/sirens are forbidden together. When his ship mates find out, they asumed it be a siren, for a mermaid doesnt use their voice to charm your average local sailor. Despite their terrifying tales and warnings, Spain continues to find out more, about this so called siren... (This is in a Mermaid/siren au, all the girls are mermaids/sirens and all the boys are sailors , because why not so ye lol ,enjoy, other than Peru and Mexico who are both Sirens but have they/them pronouns in this) ( these -> *** = timeskip) ☆