The City Hidden Inside a Snowflake

Akira Yuki, a quiet student fascinated by snow, begins to notice something strange about an early winter storm when one glowing snowflake behaves unlike any other, refusing to melt and eventually moving on its own. That night, the snowflake passes through his window, revealing an impossible miniature world hidden inside it-an intricate crystalline city of towers, roads, and living patterns-before pulling Akira into its interior. He is transported into a vast frozen realm built within a colossal snowflake, where towering ice structures, aurora-lit skies, and non-human inhabitants suggest an advanced, alien civilization. Before he can understand where he is, he is nearly killed by a massive dragon-like creature made of black ice that attacks the city, forcing a silver-haired girl-who identifies him as an outsider "giant"-to pull him into escape as alarms ring and chaos erupts, marking Akira's sudden entanglement in a hidden war inside the storm.