The Demon Seeds battle has been won and peace has returned. However, Mantarou has resumed his usual promiscuous habits. His leisurely lifestyle is disrupted by a strange dream where he competes in a tag match against Kinnikuman and Terryman, the legendary 'Machine guns' duo at the pinnacle of their careers. Is there a deeper meaning to this odd mixture of the old and the new?
Upon awakening from his nap, Mantarou senses malevolent entities hovering in the sky. These beings introduce themselves as Time Choujins and issue an unusual challenge before disappearing without a trace.
