Kamen Riders.

[ he said that with a straight face, crunching down on his candy and chewing for a second. he knew enough about them, but he wasn't going to tell just anyone all he knew. people might just get the wrong idea about him. ]

It means Masked Riders and, according to some, they are as much as a legend as the Batman. Some call them monsters no better than the creatures they fight, other call them heroes.