User blog comment:Memnarc/Character Ages/@comment-7948498-20130907091743/@comment-7948498-20130908043808

How old do students need to be to attend japanese high schools?

Still, I don't quite remember explicit proof that points directly to the age of 12 besides assuming that they must be Mikan's age because they look like it. Can you remind me? Anyways I admit that I'm assuming that Nana is sensitive about her breast size not just because of Momo, but because she is basically considered flat-chested for her age.

Well, if I'm wrong, then Momo must be a pretty well endowed 12 year old to compete with Nemesis in a boob sandwich! (Darkness ch29)