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Hentai Express
淫欲特急ゼツリンオー
The Oraga Stone is the key to powering cyborgs, which can be combined with a train to fight for either good or evil. However, the stone can only be charged through the sexual stimulation of women until they reach orgasm. When a professor steals the M-77 Express to pursue his own wicked ambitions, the balance of power is threatened.
To stop him, the good guys must deploy their own ultimate weapon: the Sex Desire Express Zetsurinou. A desperate battle ensues, where the only way to fuel their cyborg is by harnessing the same forbidden energy, forcing the heroes to make a difficult choice.