After graduating from the academy, Ash, Luke, Val, and I decided to join LIBRA, a peacekeeping organization for the three worlds. LIBRA focuses on fighting against ZERO, an underground organization that wants to eliminate the High-Rank and Low-Rank systems. I never expected this fight to become more complicated because my brother, Damien, joined ZERO. 

The challenges ahead of us are immense, from unravel the diabolical plans in the underwater lair, political power struggle in the Glasia Empire, and chaos in the Angelus World. Can we protect all three worlds from the menace of ZERO? Can I persuade Damien and bring him home?