Kamen Rider Ryuki: S1 E21 - Yui's Past Kamen Rider Ryuki

As Ouja’s ally, Knight battles with Ryuki. Acting alongside Asakura, Ren once again risks everything in this war. Now that Shinji knows his reasons, he agonizes and can only reach one conclusion. Meanwhile Tezuka has noticed there is also a riddle around Yui Kanzaki and together with her, they open the door on her sealed past…