Baron Ashura's mechanical beasts continue to wreak havoc in Tokyo, Osaka and Nagoya, forcing the Robot Corps sortie to defeat them. However, their machines prove to be ineffective at fighting the mechanical beasts. Kouji remains at the Kurogane House, knowing that if he left to help them then the Photon Power Labs would be left open to attack. While he waits, three assassin androids - the Gamia Sisters - arrive at the Kurogane House to kill Kouji. But before they can complete their mission, they are stopped by the Kurogane Five who are revealed to have special abilities and weapons. Cross is a cyborg made from Super Alloy Z, Sensei has a Super Alloy Z katana, Yasu's body contains a Photon Power Bomb, Kikunosuke can move at super speeds and had Super Alloy Z razor wire, and Django has special Super Alloy Z bullets. While they are fighting the Gamia sisters, Kouji steals the Pilder and prepares to dock with Mazinger Z - determined to defeat the attacking mechanical beasts.
機械獣に翻弄されるさやか達。だが甲児は、あしゅら男爵が送り込んだ美しき刺客アンドロイド達に襲われていた!!
面对机械兽的强力攻击光子力研究所的机器人根本就不是对手，但不愿相信甲儿的各个队员都赌气与强大的机械兽战斗着。看着电视里的情景甲儿越发着急，但迫于老板娘的压力却不得不在练习捉菊之助。这时之前那奇怪的3个美女来到了黑金屋，好色的黑暗寺和士郎化妆为服务员招待她们，在偷窥她们洗澡的时候突然发现对方的目标是杀死甲儿。
