Kamen Rider Ryuki (2002)

Shinji Kido is a carefree, inexperienced reporter for the ORE Journal, becomes Kamen Rider Ryuki in order to protect people from the monsters living inside the Mirror World and stop the senseless war among Riders that Shiro Kanzaki has started. Each Rider (except for Shinji), was lured into the Rider's battle with the promised of having his wish come true if he is the last one standing. Among the chaos Shinji somewhat befriend Ren Akiyama (Kamen Rider Knight) and Kanzaki's sister Yui.