Description:

The young witch Wadanohara has returned from a journey across the sea, only to find that her peaceful ocean home has come under attack from the nefarious Tosatsu Empire. Alongside her faithful familiars–Memoca, Dolphi, and Fukami–Wadanohara promises to do all she can to prevent a terrible war. But when a mysterious figure from her past demands that she leave, can the pure-hearted Wadanohara muster the courage and magic she needs to save the Sea Kingdom once and for all?(Source: Seven Seas Entertainment)

Description:

A story about the love between a mermaid named Myuu and a demon named Jirou. This book has various oneshots about the two characters. (Source: MangaArt)

Description:

Lucia is the new girl at school. She and her sister run a public bath that's all the rage. When Lucia meets a terrific-looking surfer boy, there's just one little problem: Lucia is a mermaid-not just any mermaid, but a princess on an important mission to save the seven seas from an evil force bent on taking control of the marine world. Such a responsibility doesn't leave much time for romance. But Lucia vows to protect her world and win the heart of handsome Kaito. (Source: Del Rey) Included one-shots: Moonlight Goddess Diana, Get Nude, Cherry Blossom