Yes but it died down back then for years and wasn't as big, now it came back recently in full force. My guess is some artist found about it and re-popularized it.
Some chemistry or canon relation. Every pair of Touhous is cute, that means nothing.
These two DO have a surprising amount of canon interaction, though. That's where the ship comes from. Aya has talked to her at the end of PoFV and during Great Fairy Wars, as well as during all of the Aya games. I think they even play together at one point. Then they got in together in AoCF.
There's crack ships based on one conversation, but this is a ship between two characters who have no reason to be interacting, but seem to go out of their way to anyway.
I remember there being a comic that explains this pairing in a different way. Basically, since Aya's a crow tengu, she still has crow instincts, mainly when it comes to liking shiny objects. So Aya is infatuated with Cirno's shiny wings.
I remember there being a comic that explains this pairing in a different way. Basically, since Aya's a crow tengu, she still has crow instincts, mainly when it comes to liking shiny objects. So Aya is infatuated with Cirno's shiny wings.