Another instance where anons can't into anime again; OP's secret isn't that odd. Bell Cranel from DanMachi is pretty cute, if you haven't already watched OP.
I think in many instances people are attracted to characters in media that are not "supposed to be the focus" of the show. Like people who go nuts for self-insert otome protagonist characters designs when the male love interests are supposed to be where all the screentime is, or the designated-bros to the male leads in harem anime.
Nozaki-kun has a scene poking fun at this: https://www.youtube.com/watch?v=0UANiABx_w8
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I think in many instances people are attracted to characters in media that are not "supposed to be the focus" of the show. Like people who go nuts for self-insert otome protagonist characters designs when the male love interests are supposed to be where all the screentime is, or the designated-bros to the male leads in harem anime.
Nozaki-kun has a scene poking fun at this:
https://www.youtube.com/watch?v=0UANiABx_w8