It feels kind of weird to have them retconned as high schoolers. It's like the editor forced the author to do that or something. They seemed like working adults in the first chapter.
@Vmpslushie Ch. 2, page 10 - At the beginning of the interview, the reporter introduces Fudou as a high school boy. They've always been high school students. You may have thought that because of yellow, who they show getting drunk. She clearly is a working adult. The heroes appear to vary in age, but we don't know anything about the other two yet.
@Cloy552: Criminal/terrorist organization with ambitions for world domination, actually. But yes, why is she, a high school beauty with what looks like a decent social life, part of such a group? I'm surprised that Fudou hasn't wondered the same and asked her already.
I hope that it will end with this twist that few series (not only jap ones) took - during working hours they are arch-enemies but after work they are just friendly guys. Like in Concerto Revolution you had this bar that heroes and evil guys just hanged out after "work" or like how Agent P and Doofenschmirtz were basically friends when they weren't fighting.