For many years, Super Sentai and Kamen Riders have protected the peace and harmony of Earth bringing hopes and dreams for the future. But when a dark day has come, a war between the two heroes brought darkness into the world. But then they realized that they need to co-exist together for Earth’s sake and do whatever it takes to protect it. After all, it was their home.
But on a faithful night, a female Super Sentai warrior fell in love with a male Kamen Rider. The Kamen Rider also had feelings for her. It was on that day where the Super Sentai and Kamen Rider formed a truce and their bonds for each other were stronger than anything in the universe.
The two heroes got married and had a son. They named him Rex as in ‘King’ in Latin. And so, Mirai Rex was born. It was then they realized that the future had high hopes for Rex because he had Super Sentai and Kamen Rider blood in him.
And as the two taught the values of life to their son, everyone knew that the greatest hero of Earth would exist soon. Very soon…
But unbeknownst to them, a new enemy appeared sooner before the hero was born. The married couple gave him to their friend, RyuuRanger of the DaiRanger. He took Rex away from them for Earth’s sake and this might be the last chance where Earth will finally have peace and harmony in the future.
Also, they need to fulfill the prophecy that was needed to the world. Even the galaxy could be in great peril.
However, the hero within Rex was not born yet. But as soon as Earth is at its greatest risk, the greatest hero in the world will be born and the future will become everyone’s dreams and hopes.
And as the years passed, Rex was learning the way of a hero…