The cover for the compilation was a real struggle. I was particularly attached to the series, so I ended up drawing about 15 different versions, scribbling down every idea I could think of and then refining the image. When I looked up yin and yang on Wikipedia, it said that just as there is yin and there is yang, each exists because the other exists, and that's how the current illustration came about. In the end, it's like the two of them are searching for each other, thinking of each other, and spinning around like yin and yang. It's great to be one of a kind.