Nobody talks about this one. That needs to stop. Tide-Line Blue builds a post-apocalyptic world flooded by catastrophe, then plants a kid and his sister on opposite sides of a war neither of them started, watching them move toward each other across 12 episodes with the kind of quiet inevitability that breaks you. The pacing never wastes time on exposition or filler. By the finale, you realize the entire story was about two people trying to find each other in a world designed to keep them apart, and it lands harder than shows with ten times the budget.

Fourteen years after the catastrophe known as the Hammer of Eden killed six billion people and left most of the land under the sea, the survivors have formed a New United Nations in the hope of lasting peace. Keel is a boy in Yabitsu, a town that grew prosperous on power from a nuclear generator the disaster carried there. His relative Aoi serves as the body's secretary general. She sees the catastrophe as a chance to build a world where people overcome differences of race and religion, but the nations refuse to change. Gould, a military officer who once helped her rebuild, comes to believe only armed force can create order. With the nuclear submarine Ulysses and a crew that includes Keel's brother Tean, he stages a coup, declares war on the New United Nations and attacks Yabitsu. The twelve-episode series combines action, adventure and drama.