Can sexuality tags be extended towards some of the characters of
Shinsekai Yori ?
It is only hinted at who they are attracted to as kids (the series starts around when they're 12) but later on they get together with each other, though I would understand if that may be a spoiler.
Specifically,
Saki Watanabe is bisexual because she is shown to have a relationship with Maria since they were young which was both romantic and platonic, but at the same time Saki also has a thing for Shun. Satoru gets with Shun for a brief spell and they do love each other, but Shun also shows interest in Saki which would make Shun himself also bisexual.
Of course there is that contentious bit people may have of "is it right to label someone's sexuality at such a young age when they're just figuring themselves out?" but at the same time, some people know their sexuality and who they're attracted to from a young age. But this is also a story where the people of this world have a built-in impulse to "love" the people around them, which easily translates to romantic and sexual love under the right circumstances, so in a sense everyone has the
capacity to be bisexual.
Sexuality in a post-apocalyptic world is hard to define