I knew this was coming but it's still sad. Especially as she may have known she was fighting a losing battle. She asked if she was cuter because she knows her crush isn't looking at her.
I love girls with red backpacks, they are so cute and funny. So anyway i guess our MC is turning gay (or is it straight cuz he got genderbended? I guess it depends on the universe and this question was never brought up)
Damn, feel sorry for all the girls that like black backpacks instead of red, and boys that like red backpacks instead of black, can't go with the color they prefer because "that would be wrong..."
After looking up that term, I've given it some thought, and my theory about why that effect may have some foundation in truth (I mean, I could just read the wikipedia article, but don't have time for that) is that we need to project a bit of our desires onto a person, they have to be in our minds something we shape them out to be rather than who they actually are, and when you know someone from a very young age, you really know them at such an intimate level from the get-go that it is hard to project anything onto them that you don't already fundamentally know about them. A certain mystery so you can fill in the blank.
That being said, I often root for the childhood friend ship (not friendship) in anime.