Minami no Jewel

Hisui, a young girl who once lived a carefree life on Kohaku Island surrounded by the ocean, must adjust to a new school and leave behind her dear friend Kairi, a dolphin with whom she shared countless memories. It is here that she meets Minato, a charismatic member of the school swim team, by chance. As Hisui navigates her new surroundings, she finds herself drawn to Minato's charming presence, but wonders if her feelings for him are a blossoming romance or simply a substitute for the companionship she misses from Kairi.