A catastrophe doesn't care about your summer plans. Mirai and Yuuki are trapped in Tokyo as everything collapses around them, and the show refuses to turn that into spectacle or heroics, it stays inside their heads, watching a girl become someone else in eleven days. The ending isn't a twist that reframes everything. It's a quiet, permanent thing that changes what the entire journey meant.
Mirai and her younger brother Yuuki are spending a summer day at Odaiba's robot exhibition when the ground starts shaking. The tremor never stops. Tokyo's iconic landmarks crumble. Roads buckle. The city transforms into a nightmare landscape in seconds, and the siblings find themselves stranded on an island with no way home. What begins as a simple journey across the city becomes something far more harrowing. Mirai and Yuuki must navigate through collapsed infrastructure, aftershocks, and the chaos of a metropolitan area in catastrophic freefall. They're joined by Mari, a motorcycle courier who knows the city's rhythms and becomes their guide through the wreckage. This isn't a disaster spectacle. It's an intimate look at how ordinary people survive extraordinary circumstances, measured in hunger, exhaustion, and the weight of uncertainty. The show captures the mundane horrors of disaster: separated families, dwindling supplies, the question of whether home still exists. Mirai's growth from a bratty teenager into someone who simply endures becomes the emotional core anchoring the city's collapse around her.