Big Fish & Begonia (2016)

Plot

Chun, a spirited young girl from an enchanting underwater realm, yearns to explore the human world. At sixteen, she transforms into a dolphin, diving into the adventures she's always dreamed of. However, her excitement turns to peril when she nearly loses her life in a treacherous vortex. A brave boy saves her, sacrificing himself in the process. Deeply touched by his selflessness, Chun uses her magic to revive him, but soon realizes that such power carries heavy consequences. Embarking on a new journey, she must navigate sacrifices to safeguard his soul until he can return to humanity.