I'm kind of amazed that Cirno grabbed a stick, FAILED TO PICK IT UP, and jammed her fingers into Letty's ass instead. Also... Letty's little "Uu! <3" when she did so.
Also, the little transleucent shines on Letty's ass combined with other... seams... makes it look like a face. Am I the only one who can see this? It's like Yoda!