The ritual they perform as a joke cracks open something real, and what follows is a show that understands how to make you care about a group of girls before it asks you to watch them fight for their lives. The action sequences move like nothing else on TV that year, fluid enough that you forget you're watching animation, grounded enough that every collision matters. It trades narrative depth for something rarer: a cast with actual chemistry, where the guilt each girl carries feels earned rather than imposed, and where a lighthearted tone never once cheapens what's actually at stake.
Asuka Tsuchimiya and her friends form the Crystal Radio Research Society, a club dedicated to investigating an old urban legend about mysterious broadcasts from alternate worlds. What begins as innocent curiosity during late-night radio sessions transforms into something far stranger when the girls actually make contact with something on the other side. Suddenly they're pulled into a dangerous game spanning multiple dimensions, where each world operates by its own rules and threats. The group discovers they possess the ability to navigate between realities, but each jump comes with a cost. As they search for answers about why they were chosen for this power, they must confront creatures and forces that treat their dimension-hopping as a war. Friendships are tested, secrets emerge, and the girls realize the ritual they thought was just folklore might be the only thing keeping their world from collapsing entirely. What started as a club project becomes a fight for survival across impossible worlds.