GIRO-50 Chargeman! Charge Mermaid's Last Battle!

After many intense battles against Gozua， the Earth Defense Team lost a large number of members. Nanami Aoi， aka Charge Mermaid， is the last survivor of Chargemen. She miraculously survived from the battle but the emergency alert goes off. Due to the destruction of the EDT base， there was no way to repair Mermaid’s armor. As she loses strength， her fighting armor dispels… Charge Mermaid can use her special weapon once before she loses all of her energy. She kills the monster with the last shot but…