Attack on Titan: The Great Escape

After a comet strike, only half the moon remained. Earth's gravity went haywire, the tides spiraled out of control, and twenty percent of the land was submerged. Some people were affected by the comet's radiation, gradually losing their minds as their bodies grew larger and larger. Unrest broke out around the world, and they became giants who steadily lost consciousness. The largest stood 120 meters tall. More than ten thousand people went missing. Those who are not of our kind cannot share our thoughts. While the giants were still growing, humanity conquered them by force and confined them all to the Japanese Peninsula, where they were placed under strict surveillance by the International Alliance. History would remember it as the Great Prison Plan.