SU: Unlocking the 4th Dimension EN/JA/ZH Global

Explore the mystery beneath the azure depths During the submarine's journey, a mechanical malfunction occurred. Dr. Pierre hurried to look into it and found oddities everywhere. Investigate the mystery beneath the azure depths and accompany Dr. Pierre as he reveals the Nautilus's mysteries.  1866 The owner of the Nautilus, Dr. Pierre, along with seven other sailors, unintentionally rescued a "compass" during their journey. He was able to see where he really was in the cosmos thanks to this compass, but it also made the Nautilus fall into the time vortex. 2998 "SU" is a future city student. She came onto an ancient submarine that was imprisoned in both time and space while diving. When SU went inside the submarine for an adventure, the time vortex ensnared him and took him to an unidentified space-time.