r-o-o-k-i-e

Four friends, including the adventurous Nobiru, embark on a trip to the mystical island of Yakushima, known for its breathtaking landscapes and ancient secrets. One fateful night, while exploring the island''''s hidden wonders, they stumble upon a mysterious cave behind a waterfall. The sound of whispers and faint echoes draws them in, and despite the treacherous path, they venture deeper into the cave.