Sougo from another world, who possesses a dark heart and is the complete opposite (真逆: the exact opposite) of Sougo, transforms into Zi-O with his left and right sides reversed! He hurls insults at Sougo, relentlessly attacking his heart and spirit.

「I am you……。But you are not me!」

The another world Sougo, who is completely opposite (否定: opposite, negative) to Sougo, pulls out the Ziku Driver and transforms! A reversed-form Zi-O, with the「Zi-O」text on his face mirrored, appears before him. Sensing the danger, Sougo also transforms into Zi-O. Now, the two Zi-Os clash!!

■Description
Tokiwa Sougo, who exists in the mirror-world.
He confronted the real-world Tokiwa Sougo after they entered the “mirror world” together with Another Ryuga, and transformed into Kamen Rider Zi-O (Mirror World) to exchange blows.
If the real-world Tokiwa Sougo is considered the “front,” then the Tokiwa Sougo inside the mirror reflects the dark side of his heart—the “back” of his existence.