Kamen Rider, the 21St Knight of Heisei

Hope lasts forever, a knight will not regret it, he will eventually become a knight and will live forever. There is no Reiwa, only Heisei. Heisei is not outdated, and hope is eternal. The 21st Heisei Knight appears in another world. What will the Demon King do? What kind of new knight is that? Is it a king or a god? Of course it's God! The alien god has arrived. The battle between gods and gods is such a spark? Who wins in the end? Are there gods in the new world? Let me describe everything. The story takes place in the Sakura Kingdom. The protagonist travels to the new era of knights and defeats the alien gods with the real knights. The Knights are the protagonists. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.