Riku didn't believe mermaids existed, his memories from when he was a child forgotten, but he couldn't shake the feelings that there was something that called him from the ocean, a deep longing.
Sora was a merman prince, who was angry with the surface world. In the overwhelming sadness and anger, he tries to go to the surface in search of his father, who was taken from them and the reason of Sora's anger.
They meet in the worst circumstances of the other, and without revealing anything, Sora trieds to do everything alone, but in the end, the secrets can't be kept.
Sora was just broken up with by his girlfriend, Kairi. Riku works at an ice cream stand where Sora and Kairi split up at, and so he decided to go eat ice cream there, but the silverette took an interest in the sad Sora. Sora feels as if his feelings aren't genuine because everyone really only likes him because of his looks and popularity, even though he only has one true friend. Looks like Riku has some convincing to do, maybe if he gives him enough ice cream, he'll come around.