The Zeravire threat temporarily ceased after Gravion utilized its ultimate attack. However, it suddenly resurfaced, necessitating the Earth Gult and Gravion to defend this world once again. During this time, the EFA has been planning to develop their own weapons against Zeravire, called Grand Trooper. As they strive to shield themselves from the threat, individuals from both sides must confront their pasts while simultaneously safeguarding their future. Additionally, the enigmatic nature of the Zeravire remains a mystery that must be unraveled.
YURIA