Sorairo Kaigan

A high school girl named Tomo enjoys living near the beach but stops visiting after her parents' divorce. One day, after being harassed on her way to school, she is saved by a kind and handsome stranger who reminds her of the ocean. He leaves behind his keys, which include a stone matching one from a childhood friend who went missing. Tomo, who believes the sea can bring people treasures, thinks she might be about to discover something extraordinary.