I was playing osu!, eating popcorn in the breaks/pauses. Then, I thought "Popcorn with osu! ... a skin? Yes! I want to make it!" :3
I got some pictures with popcorn, and blablablablabla, the skin was ready.
And for ryuuta... well, I was wondering about that... I can't put a popcorn for ryuuta xD... I was thinking in a character who loves food. And then... YUYUKO SAIGYOUJI! That's perfect! :3