Hoshi wo Ou Kodomo

While on her way to her clubhouse, Asuna Watase encounters strange sounds and eerie music coming from an old crystal radio, signaling the start of an unexpected journey. She is suddenly pulled into a dangerous adventure that takes her underground to a forgotten land. There, she is attacked by a monstrous creature, saved by an unknown figure, and chased by a determined foe. Asuna becomes involved in an ancient mystery that connects her with a young protector, leading her toward a hidden truth that could be fundamental to life.