Voltron, Defender of the Universe: Lion Force

There is a fairy tale on planet Arus of star crossed lovers who united their kingdoms when they met on a bridge between the two lands. As the Princess of Arus, Allura takes part in a ceremony where the famous meeting must be recreated. A bit of chance lands Hunk in the role of the lucky guy, but the ceremony is crashed by Lotor! Hunk and Allura are trapped on the bridge, leaving the others with no way to form Voltron.