This has something to do with a competition and getting third place.

artist commentary:
ゆうかりんまさかの3位にびっくらこいたのでらくがき(*'v'*)ゆうかりんおめでとう！！

Can someone update the pool to indicate the current rankings? I can't read moon runes.

Anelaid said:
Can someone update the pool to indicate the current rankings? I can't read moon runes.

I found English results on Shrine Maiden, so I'll list the first 20 or 50 results or something like that and link the post.