ATRI -My Dear Moments-

In the near future, a sudden and mysterious rise in sea levels has submerged much of the world. Ikaruga Natsuki, a boy who lost his mother and a leg in an accident years ago, returns to his childhood home after a difficult life in the city, only to find it half-drowned by the ocean. With no family left, his only inheritance is his oceanographer grandmother's ship and submarine-along with her unpaid debts. His last chance to reclaim his lost dreams comes when Catherine, a dubious debt collector, offers him a deal. Together, they dive into the sunken ruins of his grandmother's lab, searching for a fabled treasure she supposedly left behind. Instead of riches, they discover a girl named Atri, asleep in a coffin at the seabed. Though she is a robot, her lifelike appearance and deep emotions make her seem unmistakably human.