Mermaid Melody: Pichi Pichi Pitch Pure

As the mermaid princess of the North Pacific (one of the seven mermaid kingdoms), Lucia entrusts a magical pearl to a boy who falls overboard a ship one night. Lucia must travel to the human world to reclaim her pearl and protect the mermaid kingdoms. Using the power of music Lucia is able to protect herself and the mermaid kingdoms from a growing evil force.

Manatsu Natsuumi is a first-year junior high school student born and raised on a small island. On the day she moves from the island, She meets Laura, a mermaid girl who has come to the earth alone in search of the legendary warrior, PreCure. Laura's hometown, Grand Ocean, is attacked by a witch who lives in the dark depths of the ocean, and all of their motivational power is taken away. It is said that if the motivational power of humans is also taken away, the world will be in deep trouble. Laura is captured by the witch's servant, and Manatsu transforms into Cure Summer to save her. (Source: Crunchyroll)

My Melody arrives on Earth much to the surprise of her rival Kuromi. Together with one of the junior high school students, Yumeno Uta, they decide to protect the dreams of the people with the help of magic.

Hinako lives alone by the sea, quietly drifting through life after losing her family years ago. One day, a mermaid named Shiori saves her from a monster and says she’s come to eat her—just not yet. Until then, Shiori will stay by her side and keep her safe. In that moment, a deep hope swells in Hinako: Maybe this girl can finally grant her the ending she’s been waiting for. (Source: Crunchyroll)

Michishio Nagasumi's life couldn't be any more normal. In an odd twist of events, during his summer vacation he ends up almost drowning in the sea. Luckily, the cute mermaid Seto San appears to save him. However, San is from a yakuza mermaid family and according to their law, if a human is to catch sight of a mermaid, either he or the mermaid must die. The only other way is for Nagasumi to be taken in as a family member, marrying San. In attempts to save both of their lives, Nagasumi asks for San's hand in marriage. Nagasumi's summer vacation reaped more then what he would expect, as he must now protect San from others finding her secret out.

My Melody opens a cake shop in Mariland. After encountering a heart in the forest, strange things start happening around her. Meanwhile, Kuromi's Japanese sweets shop across the street is always empty. Kuromi searches for the secret to My Melody's cakes. My Melody and Kuromi work hard to prepare for a sweets-making contest judged by the world-famous pastry chef Pistachio. However, no one knows that this will lead to an incident that threatens the fate of Mariland. (Source: Netflix)

Plain, timid and obsessed with jellyfish, Tsukimi is a far cry from her idea of a princess. Her tepid life as a jobless illustrator comes complete with roommates who harbor diehard hobbies that solidify their status as hopeless social rejects. These wallflowers run a tight, nun-like ship, but their no-men-allowed-not-no-one-not-no-how bubble is unwittingly burst after Tsukimi brings home a rescued sea jelly and a beauty queen... who's actually a guy. When the threat of losing their cozy convent inspires this glamour boy to turn the neurotic entourage into a portrait of success, will Tsukimi take her chance to bloom, or will she end up a hot mess? (Source: Funimation)

Kanon Town is filled with music. Hibiki Houjou and Kanade Minamino have grown up in this town and have known each other since they were children. However, they no longer get along. One day the fairy Hummy from the land of music, Major Land, appears before them. The evil king Mephisto of Minor Land is planning to turn the legendary Melody of Happiness into the Melody of Misfortune. To prevent this from happening, Hibiki and Kanade transform themselves into Pretty Cure. Kanade and Hibiki have to learn to work together to collect the scattered notes of the Melody of Happiness in order to recreate the score!