Hungry Mermaid

Moi-chan and her brother Isaku are both really good body-boarders. Isaku's skill apparently gets him and his sister to America, where they move in with a friend of his. That friend is named Rerie-san. Things quickly get interesting in the new housing situation. Moi-chan finds herself attracted to Rerie. However so does Isaku! Then there is Kirain-san, a tall, slightly arrogant looking guy who likes Isaku (and Moi!) and Henri, who seems to be a person from Rerie’s past who has a liking for Reri...