Act 1: Regina Dungeon Arc is being split in several parts

Act 1A: Awakening

Act 1B: Clash! Clash! Clash!

Act 1C: Sakura, Yumiko And The slimy assault

Act 1D: an area with 2 separate paths

Act 1D-a: Yumiko's ultimate battle in windy assault plateau

Act 1D-b: Ultimate clashes between Sakura and the crimson dragon

Act 1E: Ultimate clash! Fateful encounter, Regina dungeon cleared!