Yuta and his friends attempt to unravel the mystery of the city and everyone else's memories. However, more questions arise when a strange samurai arrives and tries to tamper with Gridman.
Unless I combine with you,
I won't be able to fight.
Ich kann nicht kämpfen,
wenn wir uns nicht vereinen.
Si no me combino contigo, no podré pelear.
Pour que je lutte, on doit fusionner.
A não ser que eu me una a você,
para assim poder lutar.