Tokiwa Sougo seems like an ordinary high school student, but he has huge dreams of becoming a king, but when a pair of mysterious time travelers reveal that he will become the ruler of time, the evil Oma Zi-O, Sougo vows to become the greatest and most beloved king of all time! In a world where Kamen Riders have fought throughout the Heisei era, their great powers are now passed on to the next generations. Rejoice and celebrate the birth of a new king!