Under (Titans, #0)

For ninety-nine years, Halie has sought her destined mate on land, in order to fulfill an ancient prophecy and save her people's future. With each failure, she returns to her parents' kingdom under the sea, to find comfort with her best friend and lover, Delphinos.Delphinos would do anything to ensure Halie's happiness, but he knows she belongs with him. Watching her lose herself time and again, while she searches for her future, is more than he can bear.When the sea witch tells her she'll find The One on her next trip ashore, Halie is forced to choose between the good of her people and the love of her life. And Delphinos has no intention of making her choice any easier.