For the average population, they think that anyone who goes for members of the opposite sex lower than 16 years of age are pedophiles (unless they are 3-4 years older than the party). Most of this population will argue that anyone under the age of 18 are off-limits to adults (~20+).

If, strictly speaking, shinta|hikari is only interested in anime/manga girls, then it is safe to say that he is a borderline pedophile (couple steps away from being a danger to society). If his hebephilia is applicable to real-life girls, then he is, indeed, a pedophile. No if's, and's or but's.