Daiki Harashina

Nikuko is a brash, jolly, scattered, and passionate woman in an otherwise sleepy seaside town in northern Japan. She’s also the single mother of 11-year-old Kikuko, who is her opposite in many ways. Kikuko is a string-bean of a young girl, pensive, quietly curious, and methodical in how she approaches life in this small harbor town. Nikuko embarrasses Kikuko as any mom of a preteen would, but Nikuko’s bold spirit makes her especially well-known in a town where Kikuko herself wants nothing more than to simply blend in. As Kikuko navigates the everyday social dramas of middle school, enhanced with touches of magical realism from her ever-present imagination, a shocking revelation from the past threatens to uproot the pair’s tender relationship.

Ruka is a young girl whose parents are separated and whose father works in an aquarium. When two boys, Umi and Sora, who were raised in the sea by dugongs, are brought to the aquarium, Ruka feels drawn to them and begins to realize that she has the same sort of supernatural connection to the ocean that they do. Umi and Sora's special power seems to be connected to strange events that have been occurring more and more frequently, such as the appearance of sea creatures far from their home territory and the disappearance of aquarium animals around the world. However, the exact nature of the boys' power and of the abnormal events is unknown, and Ruka gets drawn into investigating the mystery that surrounds her new friends.